Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Dokumenttyp
- Zeitschriftenartikel (168)
- Vortrag (165)
- Beitrag zu einem Tagungsband (80)
- Posterpräsentation (19)
- Forschungsbericht (4)
- Dissertation (1)
- Forschungsdatensatz (1)
Schlagworte
- Laser beam welding (87)
- Additive manufacturing (35)
- Additive Manufacturing (33)
- Additive Fertigung (28)
- Laser metal deposition (24)
- Thermography (24)
- Numerical simulation (20)
- Microstructure (19)
- Solidification cracking (18)
- Numerical modeling (15)
- Laser implantation (14)
- Laserstrahlschweißen (14)
- Mechanical properties (14)
- Weld pool shape (14)
- Open science (13)
- Hybrid laser-arc welding (12)
- Porosity (12)
- Process monitoring (12)
- TiB2 (12)
- DED (11)
- Laser hybrid welding (10)
- Research data management (10)
- Surface texturing (10)
- Thermografie (10)
- Thick-walled steel (10)
- Deep penetration laser beam welding (9)
- Laser Metal Deposition (9)
- Laser welding (9)
- Ti-6Al-4V (9)
- AISI D2 (8)
- Digitalisierung (8)
- Element transport (8)
- Hybrid laser arc welding (8)
- Numerical modelling (8)
- Weld pool dynamics (8)
- Charpy impact toughness (7)
- Digitalization (7)
- Electromagnetic backing (7)
- High power laser beam welding (7)
- LMD (7)
- Laserhybridschweißen (7)
- Magnetic field (7)
- Magnetohydrodynamics (7)
- Open data (7)
- Resistance spot welding (7)
- Solidification (7)
- Thermal cycles (7)
- AM (6)
- Bulging effect (6)
- Deep penetration (6)
- Laser Powder Bed Fusion (6)
- Laser-Pulver-Auftragschweißen (6)
- Partial penetration (6)
- Residual stress (6)
- Welding (6)
- Welding simulation (6)
- 3D printing (5)
- Arc welding (5)
- Artificial neural network (5)
- Critical strain (5)
- Direct Energy Deposition (5)
- Directed Energy Deposition (5)
- Duplex (5)
- End crater (5)
- Grain refinement (5)
- Gründungsstrukturen (5)
- Hochfester Stahl (5)
- Hot cracking (5)
- Hybrid Laser Arc Welding (5)
- Keyhole mode welding (5)
- Laser energy distribution (5)
- Laser powder bed fusion (5)
- Laserimplantation (5)
- Liquid metal embrittlement (5)
- Numerical process simulation (5)
- Simulation (5)
- Stainless Steel (5)
- Thick-plate welding (5)
- WelDX (5)
- Widerstandspunktschweißen (5)
- X38CrMoV5-3 (5)
- 3D Druck (4)
- Additive Manufacturing (AM) (4)
- Auftragschweißen (4)
- Bulge effect (4)
- Computed Tomography (4)
- Crack (4)
- Direct energy deposition (4)
- Directed energy deposition (4)
- Endkrater (4)
- Forschungsdatenmanagement (4)
- Gap bridgeability (4)
- Heat conduction (4)
- Highspeed-plasma-laser-cladding (4)
- Inconel 718 (4)
- Keyhole dynamics (4)
- Künstliche Intelligenz (4)
- L-PBF (4)
- Laser Powder Bed Fusion (L-PBF) (4)
- Liquid Metal Embrittlement (4)
- Low Cycle Fatigue (4)
- Mathematical modeling (4)
- Neutron diffraction (4)
- Offshore Windenergieanlagen (4)
- Oscillating magnetic field (4)
- ProMoAM (4)
- Process simulation (4)
- Ray tracing (4)
- Rundnaht (4)
- Selective laser melting (SLM) (4)
- 316L (3)
- 9%Ni steel (3)
- AGIL (3)
- AlSi10Mg (3)
- Automatisierte Fertigung (3)
- Boundary element method (3)
- Bulge formation (3)
- Bulging (3)
- CT (3)
- Circumferential weld (3)
- Computed tomography (3)
- Cryogenic steel (3)
- Crystal branch development (3)
- DED-Arc (3)
- Defokussierung (3)
- Deposition welding (3)
- Dimensional accuracy (3)
- Dissimilar metal weld overlays (3)
- Edge quality (3)
- Electromagnetic Weld Pool Support (3)
- Electromagnetic forces (3)
- Electromagnetic weld pool support (3)
- Elektromagnetische Schmelzbadbeeinflussung (3)
- Elektromagnetische Schmelzbadunterstützung (3)
- Equivalent heat source (3)
- Friction stir welding (3)
- Full Penetration (3)
- Grain size (3)
- Hot stamping (3)
- Hot-Stamping (3)
- Infrared thermography (3)
- Joining dissimilar materials (3)
- Keyhole collapse (3)
- LME (3)
- LPA (3)
- Laser (3)
- Laser Beam Welding (3)
- Laser Pulver Auftragsschweißen (3)
- Laser beam melting (3)
- Laser powder bed fusion (L-PBF) (3)
- Leichtbau (3)
- Life Cycle Assessment (3)
- Mechanical mismatching (3)
- Melt pool dinamics (3)
- Mikrostruktur (3)
- Molten pool dynamics (3)
- Multi-physical modeling (3)
- Multi-physical modelling (3)
- Multispectral thermography (3)
- Online Process Monitoring (3)
- Oscillating vapor plume (3)
- Periodic solidification pattern (3)
- Prozesskette (3)
- Prozessmonitoring (3)
- Prozessüberwachung (3)
- Pufferschichten (3)
- Quality assurance (3)
- Schweißen (3)
- Steel and aluminium (3)
- TES (3)
- Temperature emissivity separation (3)
- Thermo-fluid flow (3)
- Thick Materials (3)
- Transient heat transfer (3)
- Umweltwirkungen (3)
- WAAM (3)
- Wire arc additive manufacturing (3)
- Ökobilanzierung (3)
- Überlappbereich (3)
- AISI 316L (2)
- Adaptives Schweißen (2)
- Advanced high strength steel (2)
- Advanced high strength steels (2)
- Aerosol measurements (2)
- Al/Mg alloys (2)
- Artungleiche Werkstoffe (2)
- Automatisierte schweißtechnische Fertigung (2)
- CFD-model (2)
- Coarse-grained heat-affected zone (2)
- Columnar crystal growth (2)
- Computed tomography (CT) (2)
- Condition monitoring (2)
- DED-EB (2)
- Data fusion (2)
- Data preparation (2)
- Dickblech (2)
- Digital transformation (2)
- Direct Laser Metal Deposition (2)
- Directed Enery Deposition (2)
- Distortion (2)
- Dual phase steel (2)
- Duplex AISI 2205 (2)
- Duplex steels (2)
- EBAM (2)
- Electromagnetic support (2)
- Electron beam welding (2)
- Elektromagnetische Schmelzbadsicherung (2)
- Elektronenstrahlschweißen (2)
- Embedded electronics (2)
- End-crater (2)
- FE-model (2)
- FGM (2)
- Fatigue (2)
- Ferromagnetischer Stahl (2)
- Filler material distribution (2)
- Filler wire mixing (2)
- Finite element simulation (2)
- Flüssigmetallinduzierte Rissbildung (2)
- Full penetration (2)
- Fume (2)
- Fügetechnologie (2)
- Hardness (2)
- Heat treatment (2)
- Heissrisse (2)
- High Temperature Testing (2)
- High-power laser (2)
- High-power laser beam (2)
- High-power laser beam welding (2)
- Hochleistungsschweißen (2)
- Hot crack (2)
- Hybrid welding (2)
- In situ strain (2)
- In-situ Monitoring (2)
- Keyhole mode laser beam welding (2)
- Korrosionsschutz (2)
- LCF (2)
- LPBF (2)
- Lack-of-fusion (2)
- Laser Metal Deposition (LMD) (2)
- Laser beam melting (LBM) (2)
- Laser beam welding (LBW) (2)
- Laser dispersing (2)
- Laser energy absorption (2)
- Laser metal deposition (LMD) (2)
- Laser-Hybridschweißen (2)
- Laser-metal-deposition (2)
- Laserpulverauftragschweißen (2)
- Lichtbogensensorik (2)
- Localized laser dispersing (2)
- Low heat input GMA welding (2)
- MHD (2)
- MSG-Engspaltschweißen (2)
- MSG-Schweißen (2)
- Matching ferritic welding electrode (2)
- Melt pool dynamics (2)
- Metal mixing (2)
- Misalignment of the edges (2)
- Model calibration (2)
- Molten pool (2)
- Molten pool behaviour (2)
- Moving mesh (2)
- Multiple reflections (2)
- NDT (2)
- Neuronales Netz (2)
- Neutron Diffraction (2)
- NiCrBSi (2)
- Nickel (2)
- Nickel alloys (2)
- Offshore wind (2)
- Optical Tomography (2)
- Optical flow (2)
- Optical measurement (2)
- Optical tomography (2)
- Optische Tomografie (2)
- Particle gas emission (2)
- Path planning (2)
- Penetration depth (2)
- Pipe manufacturing (2)
- Pipeline steel X120 (2)
- Plasma (2)
- Plasma-Transferred-Arc (2)
- Plasma-cutting (2)
- Plume (2)
- Powder Bed Fusion (2)
- Preheating (2)
- Presshärten (2)
- Process chain (2)
- Pulsed laser beam welding (2)
- RSW (2)
- Ray tracing method (2)
- Ray-tracing (2)
- Refill friction stir spot welding (2)
- Residual Stress (2)
- Residual stresses (2)
- SMAW (2)
- Schweißnahtbewertung (2)
- Selected Laser Melting (2)
- Selective Laser Melting (2)
- Selective Laser Melting (SLM) (2)
- Selektive-laser-melting (2)
- Ship building (2)
- Single pass welding (2)
- Solidification craking (2)
- Spatter (2)
- Stahl und Aluminium (2)
- Strain measurement (2)
- Strain rate (2)
- Submerged arc welding (2)
- Superellipse (2)
- Superelliptic Lamé curves (2)
- Surface modification (2)
- Temperature distribution (2)
- Temperature field (2)
- Tensile Properties (2)
- Testing method (2)
- Thermo-capillary convection (2)
- Thermographie (2)
- Ti64 (2)
- TiAl5V4 (2)
- Titan (2)
- Titanium (2)
- Toughness (2)
- Tribologie (2)
- Tribology (2)
- Tungsten carbide (2)
- Turbulence (2)
- Ultrasonic vibration (2)
- Vaporization (2)
- Verfahrensvergleich (2)
- Wear resistance (2)
- Weld defects (2)
- Weld pool (2)
- Weld pool behavior (2)
- Weld pool geometry (2)
- Weld pool shape approximation (2)
- Welding thermal cycle (2)
- Wire electron beam additive manufacturing (2)
- Wärmenachbehandlung (2)
- Zinc coated steel (2)
- Zink (2)
- Zugeigenschaften (2)
- 9%Ni steel, (1)
- AC magnetic field (1)
- AHSS (1)
- AM feature integration (1)
- Acoustic Emission (1)
- Adaptive MSG-Lichtbogenprozesse (1)
- Adaptive MSG-Lichtbogenschweißprozesse (1)
- Adaptive control (1)
- Adaptive remeshing (1)
- Adaptive welding beam oscillation (1)
- Adative arc welding processes (1)
- Additive manufacturing (AM) (1)
- Advanced High-Strength Steel (AHSS) (1)
- Advanced high-strength steel (1)
- Advanced high-strength steels (1)
- Al-Mg-Si-Legierungen (1)
- Al/Ti dissimilar joints (1)
- AlMg0.7SiTiB filler wire (1)
- AlMgSi Legierungen (1)
- Alloy 247 (1)
- Alloy 718 (1)
- Aluminium-Druckguss (1)
- Aluminium-Druckgusslegierung (1)
- Aluminum alloys (1)
- Aluminum bronze (1)
- Analytical model (1)
- Analytical solution (1)
- Angle dependency (1)
- Anlagen (1)
- Arc sensor (1)
- Artificial Intelligence (1)
- As-shielded arc welding (1)
- Aufgelöste Tragstrukturen (1)
- Auftriebskräfte (1)
- Austenitic welding electrode (1)
- Automated manufacturing (1)
- Automated welding (1)
- Automation (1)
- Automatisierte schweißtechniche Fertigung (1)
- Automobilindustrie (1)
- Automotive application (1)
- Beam oscillation (1)
- Beam oscillations (1)
- Bending test (1)
- Bewegtes Gitter (1)
- Bionik (1)
- Build-up strategy (1)
- Bulge (1)
- Bulging effects (1)
- CFD model (1)
- Calculation time (1)
- Carbon dioxide footprint (1)
- Centerline solidification cracking (1)
- Characterisation (1)
- Cimensional Accuracy (1)
- Circumferential welds (1)
- Clad steels (1)
- Clustering (1)
- Coarse grained heat affected zone (1)
- Computational fluid dynamics (1)
- Computer vision (1)
- Computertomografie (1)
- Control (1)
- Conventional Ni-based austenitic welding electrode (1)
- Convolutional neural network (1)
- Crack propagation (1)
- Cracking (1)
- Cracking mechanism (1)
- Crater (1)
- Creep behavior (1)
- Cryogenic Steel (1)
- Crystal Plasticity Modelling (1)
- Crystal plasticity (1)
- CuSn1 (1)
- Current density (1)
- DED-L (1)
- DED-LB (1)
- DIC (1)
- Damage prediction (1)
- Datenmanagement (1)
- Deep learning (1)
- Defekte (1)
- Deformed geometry (1)
- Dendrite growth (1)
- Density measurement (1)
- Deposition rate (1)
- Design of experiments (1)
- Die-cast aluminum (1)
- Die-casted aluminum (1)
- Digital Image Correlation (1)
- Digital image correlation (1)
- Digitalisation (1)
- Digitization (1)
- Direct laser deposition (1)
- Directed Energy Depositio (1)
- Displacement (1)
- Dissimilar friction stir welding (1)
- Dissimilar joints (1)
- Dissimilar materials (1)
- Distortion simulation (1)
- Duktilität (1)
- Dwell-time (1)
- EBSD (1)
- Edge effects (1)
- Efficient modelling (1)
- Eindringprüfung (1)
- Electro-thermomechnical model (1)
- Electrode geometry (1)
- Electromagnetic (1)
- Electromagnetic field (1)
- Electromagnetic influence (1)
- Electromagnetic stirring (1)
- Electromagnetic supported degassing (1)
- Electromagnetic weld pool support system (1)
- Electron beam (1)
- Elektonenstrahlschweißen (1)
- Elektromagnetische Badstütze (1)
- Elektromagnetische Porenreduktion (1)
- Elektromagnetische Schmelzbadstütze (1)
- Elektromagnetsiche Schmelzbadbeeinflussung (1)
- Elemenet transport (1)
- Element distribution (1)
- Emisssivity (1)
- Energy parameters of the arc (1)
- Environment (1)
- Environmental impact categories (1)
- Equivalent stress concentration factors (1)
- Equivalent volumetric heat source (1)
- Ermüdungsfestigkeit (1)
- FEM (1)
- Fatigue tests (1)
- Ferritic welding electrode (1)
- Ferromagnetic steels (1)
- Festigkeit (1)
- Fiber laser (1)
- Filler material (1)
- Filler wire (1)
- Fine-grained Steel (1)
- Finite Element Method (1)
- Finite element method (1)
- Finite element method (FEM) (1)
- Flange width (1)
- Flüssigmetallversprödung (1)
- Formgedächtnislegierungen (1)
- Fresnel reflection (1)
- Functionally Graded Materials (1)
- Funktionally Graded Material (1)
- Fusion Zone (1)
- Fusion welding (1)
- Fusion zone (1)
- Fusion zone profile (1)
- Fusion zone size (1)
- Fusion zone, nickel alloys (1)
- Fügequalität (1)
- Füllgradregelung (1)
- GMA welding (1)
- GMR sensors (1)
- GTAW (1)
- Galvanized steel (1)
- Gap bridging (1)
- Gas shielded arc welding (1)
- General analytical solutions (1)
- Gleeble (1)
- Gleeble testing (1)
- Grade S960QL steel (1)
- Grain structure (1)
- Greens function method (1)
- HSLA (1)
- Hardly separable problem (1)
- Heat Input (1)
- Heat Treatment (1)
- Heat flow (1)
- Heat generation (1)
- Heat input (1)
- Heat saturation function (1)
- Heat source models (1)
- Heißrisse (1)
- Heißzug (1)
- High brightness (1)
- High power (1)
- High process speeds (1)
- High speed laser cladding (1)
- High strength AlMgSi aluminium alloys (1)
- High strength steels (1)
- High-Power Welding (1)
- High-power fibre laser (1)
- High-strength fine-grained steels (1)
- High-strength low-alloy steel (1)
- High-strength steel sheets (1)
- Highspeed plasma (1)
- Hochleistungslaserstrahlschweißen (1)
- Hohlprofilknoten (1)
- Hold time (1)
- Hot Cracks (1)
- Hot cracking test (1)
- Hot working tool steel (1)
- Hybrid Laser-Arc Welding (1)
- Hybrid components (1)
- Hybrid-laser-arc welding (1)
- Hybridschweißen (1)
- Hydrostatic and arc pressure exceed the Laplace pressure (1)
- IR-Spektroskopie (1)
- IR-spectroscopy (1)
- Impact absorbed energy (1)
- Implementierung (1)
- In situ Monitoring (1)
- In-situ (1)
- In-situ Process Monitoring (1)
- Inconel 625 (1)
- Inconel 939 (1)
- Industrial and Manufacturing Engineering (1)
- Infrared Thermography (1)
- Instumented indentation test (1)
- Integrated alignment features (1)
- Inter layer time (1)
- Joining technology (1)
- KI (1)
- Kaltzähe Stähle (1)
- Karosseriebau (1)
- Kerbspannungskonzept (1)
- Keyhole stability (1)
- Keyhole welding (1)
- Kl (1)
- Knotenweise Zwangsbedingungen (1)
- Kriechen (1)
- Kurz- und Langriss-Ermüdungsbruchmechanik (1)
- Körperschall (1)
- Künstliche Neuronale Netze (1)
- Lamé curves (1)
- Lamé curves approximation (1)
- Laser Metal Deposition; Laser Beam Welding; Duplex; Stainless Steel (1)
- Laser cladding (1)
- Laser cutting (1)
- Laser keyhole welding (1)
- Laser melting (1)
- Laser powder-based directed energy deposition (1)
- Laser surface texturing (1)
- Laser surfacing (1)
- Laser- und Lichtbogenenergie (1)
- Laser-Pulver-Auftragschweißen (LPA) (1)
- Laser-Pulver-Auftragschweißen; Laserstrahlschweißen, Duplex, Pufferschichten (1)
- Laser-beam welding, (1)
- Laser-cutting (1)
- Laser-hybrid welding (1)
- Laser-metal-depositon (1)
- Laser-plasma hybrid (1)
- Laserauftragschweißen (1)
- Laserdispergieren (1)
- Laserstrahl-Hybridschweißen (1)
- Laserstrahlhybridschweißen (1)
- Laserstrahlschmelzen (1)
- Leichtbauprinzipien (1)
- Life Cycle Assessment (LCA) Fusion welding (1)
- Life Cycle Assessment (LCA) Impact categories (1)
- Life Cycle Assessment (LCA) Schweißprozesse (1)
- Life Cycle Assessment (LCA) Umweltwirkungen (1)
- Life cycle assessment (1)
- Lightweight principles (1)
- Liquid Metal Embrittlement (LME) (1)
- Local critical strain (1)
- Local fatigue spproaches (1)
- Localized Laser Dispersing (1)
- Lorentz force (1)
- Low Temperature Toughness (1)
- Low carbon steel (1)
- Low cycle fatigue (1)
- Low feed rates (1)
- Low heat input Gma welding (1)
- Low-Cycle-Fatigue (1)
- MAG Prozesssteuerung (1)
- MWIR (1)
- Magnesium Alloy (1)
- Magnesium alloy (1)
- Magnetic bath support (1)
- Magnetic stray field (1)
- Magnetohydrodynamics (MHD) (1)
- Magnettechnik (1)
- Maritime Components (1)
- Matching ferritic filler metal (1)
- Material modeling (1)
- Material transport (1)
- Materialmodellierung (1)
- Mechanical Properties (1)
- Mechanical anisotropy (1)
- Mechanical properties of the joints (1)
- Mechanical property (1)
- Mechanical-technological properties (1)
- Mechanisch technologische Kennwerte (1)
- Mechanische Eigenschaften (1)
- Melt pool behaviour (1)
- Melt pool defects (1)
- Melt pool depth (1)
- Melting (1)
- Metal (1)
- Metallic vapour plume (1)
- Micro computed tomography (1)
- Microstructure Tensile strength (1)
- Microstructure characterisation (1)
- Mikro-Computertomographie (1)
- Misalignment of edges (1)
- Mittelrippendefekt (1)
- Mixing behavior (1)
- Model order reduction (1)
- Modellierung (1)
- Multi - physical modeling (1)
- Multi-materials joining (1)
- NIR (1)
- Narrow gap welding (1)
- Narrow-gap welding (1)
- NbC (1)
- Necking (1)
- Neural networks (1)
- Ni-based austenitic filler metal (1)
- Ni-based austenitic welding electrode (1)
- Ni-based superalloy (1)
- NiTi-Legierungen (1)
- Nickel-based superalloy (1)
- Nickelbasis-Superlegierungen (1)
- Non-destructive Materials (1)
- Non-destructive testing (1)
- Normen (1)
- Notch stress approach (1)
- Novel metrology (1)
- Novel optical metrology (1)
- Numerical Simulation (1)
- Numerical analysis (1)
- Numerical investigation (1)
- Numerical simulations (1)
- Numerical welding simulation (1)
- Numerical welding simulations (1)
- Numerische ISmulation (1)
- Numerische Simulation (1)
- Oberflächenmessung (1)
- Oberflächenstrukturierung (1)
- Offshore Windenergie (1)
- Offshore wind turbines (1)
- Open Data (1)
- Open source (1)
- OpenScience (1)
- Optical Emission Spectroscopy (1)
- Optical emission spectroscopy (1)
- Optical measurement technique (1)
- Optical measurment technique (1)
- Optische Emissionsspektroskopie (1)
- Optische Emissionsspektroskopie (OES) (1)
- Oszillierendes Magnetfeld (1)
- Parabolic flight (1)
- Partial penetration laser hybrid welding (1)
- Partial penetration welding (1)
- Pearlitic microstructure (1)
- Phase field method (1)
- Pipe Welding (1)
- Pipe weld preparation (1)
- Pipeline (1)
- Pipeline steel of grade X120 (1)
- Plane crystalization (1)
- Plasma cutting (1)
- Plasma-cut samples (1)
- Plasma-transferred-arc (1)
- Plastic deformation (1)
- Plastic material flow (1)
- Plume heating (1)
- Pool dimensions (1)
- Porenreduktion (1)
- Porosity reduction (1)
- Porosität (1)
- Post-weld heat treatment (1)
- Powder Analysis (1)
- Ppreheating temperature (1)
- Precipitation hardening aluminum alloys (1)
- Preheatin (1)
- Primär- und Sekundärspannungen (1)
- Process development (1)
- Profilvermessung (1)
- Proper generalized decomposition (1)
- Prozessregelung (1)
- Prozesssimulation (1)
- Prüfverfahren (1)
- Qualität (1)
- Qualitätssicherung (1)
- Radiological inspections (1)
- Rail tracks (1)
- Ray teacing (1)
- Ray-tracing methods (1)
- Recycling (1)
- Reduced Order Model (1)
- Reduced order modelling (1)
- Resistance Spot Welding (RSW) (1)
- Retained Austenite (1)
- Ringversuch (1)
- Rundnähte (1)
- SLM (1)
- SLM printed plasma torch (1)
- SS316L alloy (1)
- SWIR (1)
- Safety (1)
- Schallemission (1)
- Schallemissionsanalyse (SEA) (1)
- Schmelzbadstütze (1)
- Schutzgas (1)
- Schutzgasschweißen (1)
- Schweißdatenmanagement (1)
- Schweißeigenspannungen (1)
- Schweißeigenspannungs-Tiefen-Profile (1)
- Schweißeignung (1)
- Schweißen von kaltzähen Stählen (1)
- Schweißnahtgeometrie (1)
- Schweißprozesse (1)
- Schweißsimulation (1)
- Schweißstruktursimulation (1)
- Schweißtechnik (1)
- Schweißunregelmäßigkeiten (1)
- Seam geometry (1)
- Secondary heat source (1)
- Selective laser beam melting (1)
- Sensor (1)
- Sensorik (1)
- Shielding gas (1)
- Shipbuilding steel (1)
- SimCoLas (1)
- Single-pass welding (1)
- Software (1)
- Solidification behaviour (1)
- Stabilität von Eigenspannungen (1)
- Stainless steel (1)
- Stainless steels (1)
- Standardisation (1)
- Statistische Versuchsplanung (1)
- Steady-state weld pool (1)
- Steel (1)
- Steel and Al (1)
- Strain fields prediction (1)
- Strain-rate (1)
- Stress-strain behavior (1)
- Structural steel (1)
- Superalloy (1)
- Support structures (1)
- Surface cracks (1)
- TIG welding (1)
- TIG-welding (1)
- TaC (1)
- Tantalum carbide (1)
- Technical crack detection (1)
- Temperature behavior (1)
- Temperature dependent absorption (1)
- Tensile properties (1)
- Tensile resistance spot welding experiment (1)
- Tensile strength (1)
- Tensile testing (1)
- Texture (1)
- Themral cycles (1)
- Thermal analysis (1)
- Thermal-fluid-structure coupling model (1)
- Thermo-fluid dynamics (1)
- Thermograhy (1)
- Thick materials (1)
- Thick plate welding (1)
- Thick plates (1)
- Thick steel plates (1)
- Thick-Walled Steel (1)
- Thick-walled Structures (1)
- Thick-walled steels (1)
- Thick-walled structures (1)
- Thin steel plates (1)
- Three-dimensional crystallization (1)
- TiC (1)
- TiN (1)
- Time over threshold (1)
- Titandiborid (1)
- Titanium alloy (1)
- Tool service life (1)
- Tool steel (1)
- Tool-workpiece interaction (1)
- Transformable steels (1)
- Tubular X-joints (1)
- Tubular joints (1)
- Turbine components (1)
- Two-dimensional solidification (1)
- Two-run welding technique (1)
- Unterpulverschweißen (1)
- V-notch impact toughness (1)
- Vapor recondensation (1)
- Vernetzte Produktion (1)
- Verzug (1)
- Viscoplasticity (1)
- Void defect formation mechanism (1)
- WEBAM (1)
- Weld end crater (1)
- Weld imperfections (1)
- Weld pool modeling (1)
- Weld root (1)
- Weld seam geometry (1)
- Weldability (1)
- Welding Current (1)
- Welding Simulation (1)
- Welding parameter (1)
- Welding process simulation (1)
- Weldx (1)
- Widerstandpunktschweißen (1)
- Windkraftanlagen (1)
- Wineglass shape (1)
- Wire Electron Beam Additive Manufacturing (1)
- Wire feed laser beam welding (1)
- Wire-based additive manufacturing (1)
- Wärmebehandlung (1)
- X-ray Diffraction (1)
- X-ray computed tomography (1)
- X-ray diffraction (1)
- X153CrMoV12 (1)
- X8Ni9 (1)
- Zinc (1)
- Zinkbeschichtung (1)
- Zwischenlagenzeit (1)
- deposition welding (1)
- digital image correlation (1)
- dual phase steel (1)
- highspeed plasma laser cladding (1)
- keyhole dynamics (1)
- laser energy absorption (1)
- laser energy distribution (1)
- laser hybrid welding (1)
- molten pool (1)
- numerical modeling (1)
- resistance spot welding (1)
- thermal cycles (1)
- thick plate welding (1)
- µ-gravity (1)
- Äquivalente Spannungskonzentrationsfaktoren (1)
- Äquivalente Wärmequelle (1)
- Ökonomische und ökologische Vorteile (1)
- ГИДРОДИНАМИКА (1)
- КОНВЕКЦИЯ (1)
- ЛАЗЕРНАЯ СВАРКА (1)
- МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ (1)
- СВАРОЧНАЯ ВАННА (1)
- ТЕМПЕРАТУРНОЕ ПОЛЕ (1)
- ТЕПЛОПРОВОДНОСТЬ (1)
- ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ (1)
- кратер шва (1)
- кристаллизация, (1)
- плавление, (1)
- сварочная ванна (1)
- температурное поле (1)
- функция теплонасыщения (1)
Organisationseinheit der BAM
- 9.3 Schweißtechnische Fertigungsverfahren (438) (entfernen)
Eingeladener Vortrag
- nein (165)
Automatisierungs- und Regelkonzepte für das MSG-Engspaltschweißen - Pendel- und Füllgradregelung
(2018)
Das MSG-Engspaltschweißen eignet sich auf Grund der I-Nahtvorbereitung besonders für das wirtschaftliche Fügen bei hohen Blechdicken über 100 mm und bietet darüber hinaus zusätzliche technologische Vorteile. Für die automatisierte Anwendung des Verfahrens unter Produktionsbedingungen muss dabei die Prozesssicherheit auch für mitunter große Variationen der Spaltbreite entlang der Schweißnaht gesichert bleiben. In erster Linie betrifft dies bei mechanischer Auslenkung der Drahtelektrode die Adaption der Pendelbewegung auf die jeweilige Spaltbreite um eine ausreichende Flankenanbindung zu garantieren. Für die Online-Regelung der Pendelbewegung mittels Lichtbogensensorik wurde eine Methode implementiert die die notwendigen Pendelwinkel an jeder Nahtflanke unabhängig ermittelt und darüber hinaus Fehlstellungen des Brenners sowie Veränderungen des Kontaktrohrabstandes und der Prozessparameter eigenständig kompensiert. Eine Füllgradregelung auf Grundlage optischer Erfassung und Auswertung der Schweißnahtgeometrie wurde zusätzlich eingesetzt um bei veränderlichen Nahtquerschnittsflächen einen vorgegebenen, gleichbleibenden Lagenaufbau zu erzielen.
Partial penetration welding with fiber laser on 20mm thick plates was carried out in horizontal position to study the role of secondary heating in modeling of high power fiber laser welding. Experiments were carried out using 18.8kW laser with 1.5 m/min welding speed at Ar assist gas flow rates of 0, 17, 29, and 40 l/min, all four cases show similar bead shape with bright emission of vapor plume. Numerical simulations were performed using volume of fluid method by considering three different models as models A–C. Model A considers only Fresnel reflection inside the keyhole using real time tracking of free surface. Model B considers vapor recondensation flux inside keyhole along with model A. Finally, model C is used, which considers vapor plume heating at 4100K temperature along with models A B. Secondary heating by recondensation and vapor plume is vital in modeling of high power fiber laser welding; especially, the upper part of the bead is more influenced due to secondary heating. Tungsten particles are also used to visualize the flow pattern of melt pool.
Das bislang zur Vermeidung unzulässiger Wurzelüberhöhungen beim Laserstrahlschweißen von Aluminiumlegierungen bzw. austenitischem Stahl eingesetzte Verfahren der elektromagnetischen Schmelzbadstütze konnte innerhalb der vorliegenden Untersuchung erfolgreich zur Kompensation des hydrostatischen Druckes von ferromagnetischen Stählen übertragen werden. Es wurden dabei Laserstrahlschweißversuche in PA-Position an bis zu 20 mm dickem Duplexstahl 1.4462 sowie Baustahl S235JR durchgeführt. Unter konstanten Schweißparametern wurden Durchschweißungen generiert. Dem hydrostatischen Druck wurde unter Verwendung der Technologie zur elektromagnetischen Schmelzbadunterstützung durch Variation der Oszillationsfrequenz und der AC-Leistung des Magnetsystems entgegengewirkt.
Zunächst konzentrierten sich die Versuche auf den Duplexstahl 1.4462, welcher jeweils aus 50 % Ferrit und Austenit besteht. Hierbei konnte festgestellt werden, dass zur idealen Kompensation von 15 mm bei einer Frequenz von 1,7 kHz eine AC-Leistung von 1,6 kW erforderlich ist, die Schweißnähte aber bereits bei einer AC-Leistung von ca. 0,8 kW in die Bewertungsgruppe B der DIN EN ISO 13919-1:1996-09 eingeordent werden können. Zur idealen Kompensation des hydrostatischen Druckes bei 20 mm dickem Duplexstahl war eine um 20 % höhere AC-Leistung notwendig. Im Anschluss an die Versuche mit dem Duplexstahl wurden die Untersuchungen auf bis zu 20 mm dicke Proben aus Baustahl S235JR erweitert. Für 15 mm konnten die Schweißnähte bei einer Frequenz von 1,7 kHz ab einer AC-Leistung von 1,3 kW in die Bewertungsgruppe B eingeordnet werden. Zur idealen Kompensation von 20 mm dickem Baustahl war eine AC-Leistung von 1,6 kW bei einer Frequenz von 636 Hz nötig. Mit steigender AC-Leistung konnte in allen Versuchsreihen eine sukzessive Verringerung
der Wurzelüberhöhung demonstriert werden.
Elektromagnetische Schmelzbadkontrolle wurde erfolgreich für Laser-MSG-Hybridprozess an einem (ferromagnetischen) 20 mm Baustahl und einem Pipelinestahl eingesetzt.
Einlagiges Laserstrahlschweißen von dickwandigen(>20 mm) in PA-Position bei geringeren Schweißgeschwindigkeiten prinzipiell möglich.
Reduzierung der Schweißgeschwindigkeit beim Laserstrahlschweißen hat eine Verringerung der notwendigen Laserleistung und eine Verbesserung der mechanisch-technologischen Eigenschaften von Schweißverbindungen zur Folge.
A three-dimensional multi-physics numerical model was developed for the calculation of an appropriate equivalent volumetric heat source and the prediction of the transient thermal cycle during and after fusion welding. Thus the modelling process was separated into two studies. First, the stationary process simulation of full-penetration keyhole laser beam welding of a 15 mm low-alloyed steel thick plate in flat position at a welding speed of 2 m/min and a laser power of 18 kW was performed. A fixed keyhole with a right circular cone shape was used to consider the energy absorbed by the workpiece and to calibrate the model. In the calculation of the weld pool geometry and the local temperature field, the effects of phase transition, thermo-capillary convection, natural convection and temperature-dependent material properties up to evaporation temperature were taken into account. The obtained local temperature field was then used in a subsequent study as an equivalent heat source for the computation of the transient thermal field during the laser welding process and the cooling stage of the part. The system of partial differential equations, describing the stationary heat transfer and the fluid dynamics, were strongly coupled and solved with the commercial finite element software COMSOL Multiphysics 5.0. The energy input in the transient heat transfer simulation was realised by prescription of the nodes temperature. The prescribed nodes reproduced the calculated local temperature field defining the equivalent volumetric heat source. Their translational motion through the part was modelled by a moving mesh approach. An additional remeshing condition and helper lines were used to avoid highly distorted elements. The positions of the elements of the polygonal mesh were calculated with the Laplace’s smoothing approach. Good correlation between the numerically calculated and the experimentally observed weld bead shapes and transient temperature distributions was found.
Recently developed fibre lasers provide multi-kilowatt beam power with high quality at impressive energy efficiency. Combined with gas metal arc welding (GMAW) equipment these lasers can be used in a hybrid process to weld thick-walled constructions single-pass, that are currently welded using multi-pass techniques. The main benefits are a reduction of heat induced distortions, due to the low heat input, as well as savings in filler material and process time. Probable applications can be found in power generation, ship building and pipeline constructions. An orbital (girth) laser-hybrid process using a 20 kW fibre laser and a GMAW torch is currently examined at the BAM, Berlin. The aim of this research is to obtain a stable and crack free girth welding process and to demonstrate its application in pipeline construction. The experiments are carried out on 16 mm thick plates as well pipe rings with 36" (914 mm) pipe diameter of X65. Particular welding parameters, such as welding speed, GMAW power, arc length are varied and their influence on the appearance of the weld in the different welding positions is analyzed. Even though issues remain that demand further research it could already be shown that the rings can be welded using a girth hybrid process that is divided into two half girth processes in downward direction.
One of the main factors affecting the use of lasers in the industry for welding thick structures is the process accompanying solidification cracks. These cracks mostly occurring along the welding direction in the welding center, and strongly affect the safety of the welded components. In the present study, to obtain a better understanding of the relation between the weld pool geometry, the stress distribution and the solidification cracking, a three-dimensional computational fluid dynamic (CFD) model was combined with a thermo-mechanical model. The CFD model was employed to analyze the flow of the molten metal in the weld pool during the laser beam welding process. The weld pool geometry estimated from the CFD model was used as a heat source in the thermal model to calculate the temperature field and the stress development and distributions. The CFD results showed a bulging region in the middle depth of the weld and two narrowing areas separating the bulging region from the top and bottom surface. The thermo-mechanical simulations showed a concentration of tension stresses, transversally and vertically, directly after the solidification during cooling in the region of the solidification cracking.