Ingenieurwissenschaften und zugeordnete Tätigkeiten
Filtern
Dokumenttyp
- Vortrag (17)
- Beitrag zu einem Tagungsband (6)
- Sonstiges (1)
Referierte Publikation
- nein (24) (entfernen)
Schlagworte
- Additive Fertigung (18)
- Hochfester Stahl (18)
- Eigenspannungen (17)
- MAG-Schweißen (8)
- Kaltrisssicherheit (7)
- Windenergie (4)
- Wärmeführung (4)
- Residual stresses (3)
- Additive Manufacturing (2)
- Heat control (2)
- High-strength structural steels (2)
- Härteprüfung nach Vickers (2)
- Reparaturschweißen (2)
- Residual stress (2)
- Vickers hardness (2)
- Wire Arc Additive Manufacturing (2)
- Additive manufacturing (1)
- Cold cracking safety (1)
- DED-arc (1)
- Gefügedegradation (1)
- High strength steel (1)
- High-strength Steels (1)
- High-strength filler metals (1)
- MAG-Welding (1)
- Residual Stress (1)
- Residual Stresses (1)
- WAAM (1)
- Wind energy (1)
- cold cracking safety (1)
- high-strength steel (1)
Organisationseinheit der BAM
Eingeladener Vortrag
- nein (17)
WAAM process influences on local microstructure and residual stresses in high-strength steels
(2021)
High-strength fine-grain structural steels have great potential for weight optimization of many modern engineering structures. Efficient manufacturing can be achieved here above all by Wire Arc Additive Manufacturing (WAAM). First commercial high-strength welding consumables for WAAM are already available. Due to a lack of knowledge and guidelines for the industry regarding welding residual stresses and component safety in manufacturing and operation, their application is still severely limited. Residual stresses play a crucial role here, as the special microstructure of high-strength steels is sensitive to cold cracking.
For this reason, process- and material-related influences, as well as the design effects on residual stress formation, are being investigated in a project funded by the AiF (FOSTA P1380/IGF 21162 BG). This study focuses on determining the interactions between heat control during WAAM process, resulting hardness, microstructure, and residual stresses, analyzed by X-ray diffraction. Welding experiments using geometrically similar AM specimens show that, with regard to the heat input, the energy per unit length in particular leads to significantly affected cooling times and microstructures and causes pronounced localized effects in terms of residual stresses in the upper weld beads.
WAAM process influences on local microstructure and residual stresses in high-strength steels
(2021)
High-strength fine-grain structural steels have great potential for weight optimization of many modern engineering structures. Efficient manufacturing can be achieved here above all by Wire Arc Additive Manufacturing (WAAM). First commercial high-strength welding consumables for WAAM are already available. Due to a lack of knowledge and guidelines for the industry regarding welding residual stresses and component safety in manufacturing and operation, their application is still severely limited. Residual stresses play a crucial role here, as the special microstructure of high-strength steels is sensitive to cold cracking.
For this reason, process- and material-related influences, as well as the design effects on residual stress formation, are being investigated in a project funded by the AiF (FOSTA P1380/IGF 21162 BG). This study focuses on determining the interactions between heat control during WAAM process, resulting hardness, microstructure, and residual stresses, analyzed by X-ray diffraction. Welding experiments using geometrically similar AM specimens show that, with regard to the heat input, the energy per unit length in particular leads to significantly affected cooling times and microstructures and causes pronounced localized effects in terms of residual stresses in the upper weld beads.
Hochfeste Feinkornbaustähle verfügen über ein großes Potenzial für gewichtsoptimierte, effiziente Strukturen in vielen modernen Stahlkonstruktion. Weitere Effizienzsteigerungen können durch additives Fertigen sowie bionische Bauweisen erreicht werden. In dieser Präsentation werden erste Ergebnisse der Eigenspannungsanalysen von additiv gefertigten Bauteilen aus hochfestem Stahl vorgestellt.
Hochfeste Feinkornbaustähle verfügen über ein großes Potenzial für gewichtsoptimierte, effiziente Strukturen in vielen modernen Stahlkonstruktion. Weitere Effizienzsteigerungen können durch additives Fertigen sowie bionische Bauweisen erreicht werden. In dieser Präsentation werden erste Analysen des Einflusses der Fertigungsstrategie auf die Härte in additiv gefertigten Bauteilen aus hochfestem Stahl vorgestellt.