激光增材修复单晶高温合金的热裂纹形成机制

卢楠楠, 郭以沫, 杨树林, 梁静静, 周亦胄, 孙晓峰, 李金国

Formation Mechanisms of Hot Cracks in Laser Additive Repairing Single Crystal Superalloys

LU Nannan, GUO Yimo, YANG Shulin, LIANG Jingjing, ZHOU Yizhou, SUN Xiaofeng, LI Jinguo

图3 纵向裂纹断口形貌及裂纹尖端液膜分布的SEM像

Fig.3 SEM images of longitudinal crack fracture morphology (a) and liquid film distribution at the crack tip (b)