NDLI: Energy Transport and Thermal Stress Formation in Hybrid Laser-MIG Welding

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zhou, Jun Khalilollahi, Amir Tsai, Hai-Lung
Copyright Year	2013
Abstract	This study is focusing on understanding the thermal stress formation in hybrid laser-MIG welding which has been gaining a lot of interests due to its many advantages over laser welding. Thermal stress formation is tightly associated with heat and mass transfer in hybrid laser welding, so accurate analysis of heat transfer process in the welding process is critical to correctly predict thermal stress information and residual stress in hybrid laser welds. In this study, a comprehensive heat and mass transfer model analyzing the energy, mass, and momentum transport processes in hybrid laser-MIG welding is successfully integrated with a mechanical model to study thermal stress formation in hybrid laser-MIG welding and residual stress in final welds as well. High compressive stress is found to exist on the top surface of the weld which might cause irregular welds topology and high tensile residual stresses were found in some locations in the final weld. This proposed study can be used as a foundation to further understand the thermal stress formation mechanisms in welding and to provide an efficient way to optimize the hybrid laser-arc welding process.
File Format	PDF
ISBN	9780791856369
DOI	10.1115/IMECE2013-64503
Volume Number	Volume 8C: Heat Transfer and Thermal Engineering
Conference Proceedings	ASME 2013 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2013-11-15
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Welding Momentum Residual stresses Topology Laser welding Mass transfer Stress Welded joints Heat Compressive stress Lasers Transport processes Thermal stresses Heat transfer
Content Type	Text
Resource Type	Article

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