脉冲电流辅助等离子弧焊Al-Mg合金晶粒细化机理

袁涛, 赵晓虎, 蒋晓青, 任学磊, 李博阳

Mechanism of Grain Refinement of Pulse Current Assisted Plasma Arc Welded Al-Mg Alloy

YUAN Tao, ZHAO Xiaohu, JIANG Xiaoqing, REN Xuelei, LI Boyang

图8 不同类型脉冲电流对焊缝晶粒尺寸和大角度晶界占比的影响

Fig.8 Influence of different types of pulse current on grain size and the proportion of large-angle grain boundaries (LAGBs)