Research Progress on Solidification Cracking of Aluminum Alloy During Welding and Crack Resistance of Filler Materials
The high-quality welding of aluminum alloy plays a vital role in lightweight manufacturing.However,aluminum alloys are susceptible to solidification cracking and are easy to crack during welding,which seriously affects the quality and safety reliability of welding structures.Solidification crack occurs in the mushy zone behind the high-temperature molten pool.The initiation and propagation of solidification cracking is a high-temperature complex process affected by many factors.The high-temperature metallurgical behavior in the mushy zone is particularly critical.A comprehensive analysis of the research status of welding solidification cracks of aluminum alloys and the crack resistance of filler materials has important guiding significance for deep understanding of the mechanism and suppression of welding solidification cracks of aluminum alloys.The current status and progress of research on solidification cracking mechanism,criterion,susceptibility testing,influencing factors,and cracking resistance of filler materials are summarized.In addition,future research directions are also pointed out.A valuable reference is provided for the in-depth study on the metallurgical mechanism of solidification cracking of aluminum alloy and crack suppression.
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