Laser welding is an accepted method for joining powertrain components, but can often require welding high alloy steels in highly restrained joint configurations. The combination of high alloy content and restraint greatly increases cold cracking susceptibility in the weld. A numerical modeling study was undertaken to understand the residual stress and microstructures in high restraint laser welded assemblies. The effects of different joint features such as grooves and shoulders were included in the analysis. Microstructural predictions were verified by analyzing the microhardness and microstructure of a welded assembly.
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© 2004 Laser Institute of America.
2004
Laser Institute of America
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