Investigation on solidification crack of laser welding ZL114A aluminum alloy
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School of Material Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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Corresponding author:
HUANG An-guo, huang-anguo@163.com
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Received Date:
2009-03-05
Accepted Date:
2009-06-24
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Abstract
In order to study the impact of the alloying elements on ZL114A aluminum alloy solidification cracking, three aluminum alloy welding wires of different compositions were applied to add various elements to the weld.The impact of these alloy elements on the ZL114A sheet solidification crack sensitivity were analyzed in theory and verified in experiments.The result shows that three main alloy elements Al,Mg and Si element exist close to the solidification crack.It was found that the enrichment of Mg and Si element nearby the solidification crack resulting in the formation of some low melting point eutectics of Al-Si,Mg-Si,Al-Mg2Si at the boundary of columnar crystals.These low melting point eutectics are closely related to the generation of ZL114A aluminum alloy solidification crack.The result is helpful for the study of laser welding ZL114A aluminum alloy solidification cracking in the prospective of metallurgical factors research.
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