TY - CONF A1 - Pittner, Andreas T1 - Potenzial der Schweißsimulation bei fügetechnischen Fragestellungen T2 - Treffen des DVS Beziksverband Berlin, BAM CY - Berlin, Germany DA - 2012-10-31 PY - 2012 AN - OPUS4-28678 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - GMA welding of AW-6082 using filler wires fostering grain refinement in the weld metal N2 - The application of welded aluminum constructions has increased over the last decades due to the high demand for lightweight design. In this context aluminum alloys have a significant importance especially the heat treatable Al-Mg-Si alloys. With regards to welding the heat input causes the dissolving of the precipitates yielding a degradation of the strength properties. Furthermore, there is the risk of solidification cracking during welding for Al-Mg-Si alloys, especially AW 6082-T6. As a consequence Al-Mg-Si alloys are welded using a dissimilar filler material based on 5xxxx aluminum alloys that yields a reduction of resulting strength properties in comparison to the base material. Therefore, the paper presents the application of a novel massive filler wire for Al-Mg-Si alloys. The wire consists of AW 6082 with additionally added AlTi5B1 master alloy fostering the grain refinement of the weld metal. Exemplarily for the base material AW 6082-T6 GMA welding experiments are performed using the novel filler wire 6082TiB. It could be shown that solidification cracks could totally be avoided. The tensile strength of the welded joints are evaluated and compared with weldments using a conventional 5183 filler wire. Artificial aging is performed after welding in order to improve the strength properties by solution hardening showing the potential of these alloys. T2 - 10th International Conference Trends in Welding Research CY - Tokyo, Japan DA - 11.10.2016 KW - Filler wires KW - MIG welding KW - Aluminium 6082 KW - Precipitation hardening KW - Mechanical properties PY - 2016 AN - OPUS4-38290 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Schweißeignungsuntersuchungen an hochfesten Feinkornbaustählen beim Einsatz modifizierter Sprühlichtbogenprozesse N2 - Der Einsatz modifizierter Sprühlichtbogenprozesse zum Schweißen von hochfesten Feinkornbaustählen wird aufgezeigt. Besonderes Augenmerk wird den Entstehungsmechanismen aufgetretener Mirkorisse gewidment, welche als Heißrisse klassifiziert werden. T2 - 58. Sitzung der Arbeitsgruppe V.24 "Schutzgasschweißen mit abschmelzender Elektrode MIG/MAG" des AfT des DVS CY - München, Linde AG, Germany DA - 08.10.2014 KW - Modifizierte Sprühlichtbogenprozesse KW - Hochfeste Feinkornbaustähle KW - Heißrisse PY - 2014 AN - OPUS4-38296 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Schweißeignungsuntersuchungen an hochfesten Feinkornbaustählen beim Einsatz modifizierter Sprühlichtbogenprozesse N2 - Die Ergebnisse umfangreicher Schweißeignungsuntersuchungen zum Einsatz modifizierter Sprühlichtbogenprozesse beim Schweißen hochfester Feinkornbaustähle werden aufgezeigt unter besonderer Berücksichtigung aufgetretener Mikrorisse. T2 - 2. Ilmenauer schweißtechnisches Symposium CY - TU Ilmenau, Germany DA - 13.10.2015 KW - MSG-Schweißen KW - Modifizierter Sprühlichtbogen KW - Hochfeste Feinkornbaustähle KW - Mikrorisse PY - 2015 AN - OPUS4-38295 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Möglichkeiten der Schweißsimulation für dickwandige Strukturen zur Vorhersage von Verzug und Eigenspannungen N2 - Möglichkeiten der Schweißstruktursimulation zur Bewertung und Auslegung dickwandiger Komponenten werden aufgezeigt und anhand von Anwendungsbeispielen erörtert. T2 - Workshop des Fraunhofer IPK "Unterpulverschweißen dickwandiger Bauteile" CY - Berlin, Fraunhofer IPK, Germany DA - 12.05.2016 KW - Schweißstruktursimulation KW - Mehrlagenschweißen KW - Eigenspannungen KW - Verzug KW - Materialmodellierung PY - 2016 AN - OPUS4-38293 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Angewandte Schweißsimulation in der Forschung T2 - Industrieworkshop "Schweißsimulation in der industriellen Praxis", Produktionstechnisches Zentrum Berlin CY - Berlin, Germany DA - 2013-02-20 PY - 2013 AN - OPUS4-28681 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - An efficient solution of the inverse heat conduction problem for welding simulation T2 - 9th International Seminar "Numercial Analysis of Weldability" CY - Seggauberg, Austria DA - 2009-09-28 PY - 2009 AN - OPUS4-20850 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Einsatz vernetzter Sensorik für datenbasierte Regelung von MSG-Schweißprozessen N2 - In diesem Vortrag werden die Möglichkeiten vernetzter Sensorik zur Digitalisierung der schweißtechnischen Prozesskette aufgezeigt. Besonderer Fokus liegt auf der Fusion von Messdaten aus unterschiedlichen physikalischen Domänen. Dies ermöglicht die Korrelation relevanter den Schweißprozess charakterisierenden elektrischen Kenngrößen mit optisch gemessenen geometrischen Qualitätsmerkmalen der Schweißnaht. Die dynamische Prozessführung ermöglicht hierbei das Generieren großer inhomogener Datenmengen, was ein entsprechendes Schweißdatenmanagement erfordert. Durch Einsatz von Methoden des maschinellen Lernens konnten Regressionsmodelle abgeleitet werden, welche Grundlage für eine adaptive Prozessführung sind. T2 - DVS AfT AG V2.8 "Lichtbogenphysik" - Lichtbogenkolloquium 2018 CY - GSI Gesellschaft für Schweißtechnik International mbH Duisburg, Germany DA - 14.03.2018 KW - Digitalisierung KW - Adaptive MSG-Lichtbogenschweißprozesse KW - Künstliche Intelligenz KW - Datenmanagement PY - 2018 AN - OPUS4-46638 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Data-based arc welding control - Applicability for thick walled structures N2 - The development within the offshore wind energy sector towards more powerful turbines combined with increasing water depth for new wind parks is challenging both, the designer as well as the manufacturer of support structures. Besides XL-monopiles the jacket support structure is a reasonable alternative due to the high rigidity combined with low material consumption. However, the effort for manufacturing of the hollow section joints reduces the economic potential of jacket structures significantly. Therefore, a changeover from an individual towards a serial production based on automated manufactured tubular joints combined with standardized pipes has to be achieved. Hence, this paper addresses the welding process chain of automated manufactured tubular joints including digitization of the relevant manufacturing parameters such as laser scanning of the weld seam geometry. T2 - TWI - Wind Energy - Challenges in integrity management CY - Granta Centre, TWI Ltd., Cambridge, UK DA - 15.03.2018 KW - Digitalisation KW - Adative arc welding processes KW - Offshore wind PY - 2018 AN - OPUS4-46636 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Ökologische Bilanzierung von Schmelzschweißverfahren unter Berücksichtigung vor- und nachgelagerter Prozessschritte N2 - In diesem Vortrag werden die aktuellen Forschungsergebnisse im Bereich der ökologischen Bilanzierung von Schweißprozessen dargestellt. Der Fokus liegt hierbei in der automatisierten Berechnung der Umweltwirkungen der Schweißprozesse unter Berücksichtigung vor- und nachgelagerter Prozessschritte. Die Ermittlung der Ökobilanz eines Schweißprozesses erfordert lediglich die Sachbilanzierung relevanter In- und Outputströme. Letztere werden auf Basis entsprechender Sensormessdaten (Leistungsaufnahme Schweißanlagen, Medienverbrauch, etc.) automatisiert nachverfolgbar für jede Schweißung ermittelt. T2 - DVS Sitzung des Fachausschuss 3 "Lichtbogenschweißen" CY - INP Greifswald, Germany DA - 10.10.2018 KW - Ökobilanzierung KW - Umweltwirkungen KW - Life Cycle Assessment PY - 2018 AN - OPUS4-46640 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Analysis of head and fluid flow phenomena of double-sided V-groove welds of high-strength low alloy steel T2 - 10th International Seminar "Numerical Analysis of Weldability" CY - Seggau-Graz, Austria DA - 2012-09-24 PY - 2012 AN - OPUS4-28684 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Schnelle numerische Methode für die effiziente Temperaturfeldberechnung in bauteilnahen Geometrien und Mehrlagenschweißen T2 - Workshop "Anwendungsnahe Schweißsimulation" des DVS, RWTH Aachen CY - Aachen, Germany DA - 2013-05-23 PY - 2013 AN - OPUS4-28680 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Schweißeignungsuntersuchungen an hochfesten Feinkornbaustählen beim Einsatz modifizierter Sprühlichtbogenprozesse T2 - Workshop "Lichtbogenphysik", Otto von Guericke Universität CY - Magdeburg, Germany DA - 2013-02-12 PY - 2013 AN - OPUS4-28682 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Potentials of welding simulation in joining technologies T2 - Seminar "Welding Simulation" im Rahmen des SFB 1026 "Sustainable Manufacturing" der TU Berlin CY - Berlin, Germany DA - 2013-06-13 PY - 2013 AN - OPUS4-28679 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Global Optimisation and Sensitivity Analysis Utilised For Welding Simulation T2 - 2nd International Symposium on Computer-Aided Welding Engineering CY - Jinan, China DA - 2012-08-23 PY - 2012 AN - OPUS4-28683 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Life cycle assessment of fusion welding processes methodology and implementation N2 - Fusion welding processes in manufacturing are resource-intensive, creating a significant opportunity to reduce their environmental impact. While the environmental effects of these processes are qualitatively understood, quantitatively assessing the key influencing parameters remains challenging. This study presents a welding-specific methodology leveraging life cycle assessment (LCA) to quantitatively measure the environmental footprint of fusion welding technologies. The proposed approach identifies and evaluates the critical parameters that influence the environmental performance of various welding methods, including conventional joint welding and additive manufacturing through the Direct Energy Deposition-Arc (DED-Arc) process. By incorporating real-time resource consumption data, the methodology provides a novel framework for directly linking process parameters to environmental impacts. This research offers a precise and quantitative analysis of the ecological effects of welding processes, supporting their optimization and promoting the development of more sustainable manufacturing practices. T2 - European welding association - executive meeting 2 CY - Milano, Italy DA - 03.12.2024 KW - Life cycle assessment KW - Fusion welding KW - Sensitivity study PY - 2024 AN - OPUS4-62018 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Automated arc welding and quality assessment of large scale support structures for offshore wind turbines N2 - Offshore wind energy is a key driver in achieving a carbon dioxide-free industrial sector over the coming decades. However, the foundation systems for offshore wind plants significantly influence the overall installation process, alongside regulatory challenges. The adoption of lightweight design principles in steel construction, such as the use of dissolved load-bearing structures known as jacket foundations, holds substantial promise for reducing resource use, particularly the required volume of steel. This presentation focuses on the complete digitalization of the welding manufacturing and testing processes, enabling fully automated production and quality assessment of tubular nodes, which are critical components of jacket foundation structures. Additionally, the study examines the correlation between seam geometry and fatigue strength through numerical simulations inspired by bionic design principles. It demonstrates that tubular nodes can be welded entirely automatically while accommodating geometric tolerances. Moreover, seam geometries can be precisely manufactured according to the numerical models, significantly enhancing the service life of the structures. Finally, the resource efficiency and reduction in carbon dioxide emissions resulting from these advancements are analyzed through a life-cycle assessment, highlighting the environmental benefits of this approach. T2 - 77th IIW Annual Assembly and International Conference, C-XII: Arc Welding Processes and Production Systems CY - Rhodos, Greece DA - 07.07.2024 KW - Offshore wind KW - Support structures KW - Light-weight construction KW - Automated arc welding PY - 2024 AN - OPUS4-62016 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Datei- und zugehörige Qualitätsstandard für Forschungsdaten im Bereich Schweißtechnik N2 - Ziel des WelDX Forschungsvorhabens ist es, den Austausch wissenschaftlicher Forschungsdaten aus dem Bereich der Schweißtechnik auf Basis eines einheitlichen Open Source Dateiformates zu ermöglichen und damit die Einhaltung und Dokumentation geeigneter Qualitätsstandards zu fördern. Im Zuge der Projektarbeit wird die Zusammenarbeit und der Wissenstransfer schweißtechnischer Institute zunächst auf nationaler Ebene gefördert und die Bildung eines von der Fachcommunity getragenen Kuratoriums zur Betreuung und Weiterentwicklung des Dateiformates und der Ausarbeitung zugehöriger Qualitätsstandards angestrebt. Zunächst erfolgt die Erstellung und Veröffentlichung eines geeigneten Dateiformates zum Austausch großvolumiger, detaillierter Forschungsdaten im Bereich mechanisierter und automatisierter Schweißverfahren. Durch die Nutzung des Dateiformates zur Dokumentation der Forschungsarbeiten soll auch für komplexe Schweißaufgaben und Versuchsaufbauten eine deutlich gesteigerte objektive Vergleichbarkeit der Messdaten und Ergebnisse im Sinne der guten wissenschaftlichen Praxis zwischen den Instituten erzielt werden. T2 - Vernetzungsveranstaltung zu „Kurationskriterien und Qualitätsstandards von Forschungsdaten“ CY - Berlin, Germany DA - 26.09.2019 KW - Schweißen KW - Forschungsdatenmanagement KW - Open science KW - Open data KW - Digitalisierung PY - 2019 AN - OPUS4-49385 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Wire arc additive manufacturing of high strength AL-MG-SI alloys N2 - Gas metal arc-based direct energy deposition (DED) additive manufacturing technologies hold significant promise for producing large-scale metal components. However, determining optimal process parameters to achieve the desired near-net shape design and mechanical performance is a complex challenge due to the intricate interplay between process parameters and material properties. This presentation highlights the use of a newly developed solid welding wire doped with TiB to improve grain refinement in metals deposited via DED-Arc for high-strength precipitation-hardening AlMgSi aluminum alloys. This wire stems from our initial metallurgical investigations into grain refinement in aluminum weld metals. The research emphasizes the relationship between process parameters and component quality, aiming to uncover the mechanisms that influence performance. This is essential for establishing a reliable range of parameters that meet quality standards, many of which are derived from traditional welding practices. Component quality was assessed by studying pore size, pore distribution, and grain morphology. To further enhance the mechanical properties of the deposited material, post-weld heat treatments—including solution treatment, quenching, and artificial aging—were applied. The study also explores how different heat treatment strategies affect the final mechanical properties. To validate the feasibility of 3D printing high-strength aluminum alloys, a more complex demonstrator component was fabricated. The results demonstrate that DED-Arc technology can produce large aluminum parts with a quality comparable to subtractive manufacturing techniques. Furthermore, the entire additive manufacturing workflow has been digitally integrated, enabling full traceability of all key process steps. This digital integration is critical for ensuring reliable quality assessments of the finished components. T2 - 77th IIW Annual Assembly and International Conference Joint Meeting of C-I, C-IV, and C-XII CY - Rhodos, Greece DA - 07.07.2024 KW - DED-Arc KW - High-strength aluminium alloys KW - Porosity assessment KW - Component testing KW - CT-analyses PY - 2024 AN - OPUS4-62014 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Pittner, Andreas T1 - Additive Manufacturing of High Strength Al-Mg-Si Alloys with DED-Arc N2 - Direct energy deposition additive manufacturing technologies that utilize an electric arc have great potential for generating large volume metal components. However, selecting process parameters that yield the desired near net shape design and requested mechanical component behavior is not a trivial task due to the complex relationship between all process parameters and material characteristics. This presentation exemplifies the application of a newly developed solid welding wire doped with TiB to enhance grain refinement in the deposited metal for additive manufacturing based on DED-Arc of high-strength precipitation hardening AlMgSi-aluminum alloys. It is worth noting that the solid wire is the result of our preliminary metallurgical studies on grain refinement in aluminum weld metal. Consequently, research focuses on the correlation between process parameters and component quality to understand the underlying mechanisms. This is crucial for evaluating a robust process parameter space that yields component quality in line with corresponding standards which are mainly taken from welding technology. Specifically, we examine component quality by analyzing pore size and distribution, as well as grain morphology. To enhance the mechanical properties of the deposited metal, a post-weld heat treatment was conducted, comprising of solution treatment, quenching, and artificial aging. The study also evaluates the effects of various heat treatment strategies on the final mechanical properties of the material. To demonstrate the applicability of 3D metal printing of high-strength aluminium alloys, a more complex demonstrator was created. It has been shown that DED-Arc can produce high-volume aluminium parts with the same quality as the corresponding subtractive processing strategy. Additionally, the entire additive manufacturing chain has been digitally integrated, enabling traceability of all relevant process steps, which is essential for reliable subsequent quality assessment. T2 - 4th Symposium on Materials and Additive Manufacturing - Additive 2024 CY - Berlin, Germany DA - 12.06.2024 KW - DED-Arc KW - High-stength aluminium alloys KW - Grain refinement KW - Quality assurance PY - 2024 AN - OPUS4-60248 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -