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4 传统脉冲电流等离子弧焊焊缝横截面偏光图
Fig.4 Polarization micrographs of cross-section of conventional pulse current PAW
(a) C0 (b) S1 (c) S2 (d) S3 (e) S4 (f) S5