Dendrite remelting during arc oscillation welding of magnesium alloys: a phase-field study

被引：6
|
作者：
Yue, Chen [1 ]
Geng, Shaoning [1 ]
Guo, Lingyu [1 ]
Han, Chu [1 ]
Jiang, Ping [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, State Key Lab Digital Mfg Equipment & Technol, Wuhan 430074, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2022年 / 128卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Welding; Arc oscillation; Magnesium; Dendrite remelting; Phase-filed method; NONLOCAL OPERATOR METHOD; SOLIDIFICATION CRACKING SUSCEPTIBILITY; AL-CU ALLOYS; GRAIN-REFINEMENT; MG; SIMULATION; GROWTH; POOL;
D O I：
10.1007/s00339-022-05531-y
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Based on two-dimensional phase-filed simulations, we demonstrated how the solidification morphologies evolved during gas-tungsten arc welding of Mg-4.0 wt% Al magnesium alloy with transverse arc oscillation. Results showed that reheating caused by arc oscillation can cause dendrite fragmentation by remelting/pinch-off of sidebranches. Furthermore, the effects of arc oscillation frequency on the solidification morphologies during welding were investigated. We found that the oscillation frequency can significantly alter the reheating time duration during cooling, affect the sidebranches' pinching behavior, and influence the formation of the dendrite fragments. Results from this research are consistent with previous experimental results.
引用
收藏
页数：8
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