GH4151难变形高温合金的拉伸行为及其断裂失效机制

崔天亮, 谢兴飞, 温晓灿, 吕少敏, 曲敬龙, 杜金辉

Tensile Behavior and Fracture Mechanism of Hard-to-Deform GH4151 Superalloy

CUI Tianliang, XIE Xingfei, WEN Xiaocan, LYU Shaomin, QU Jinglong, DU Jinhui

图4 650~800 ℃拉伸后GH4151合金断口横截面的OM和SEM像

Fig.4 Cross-sectional OM (a-d) and SEM (e-g) images of fracture morphologies of GH4151 alloy after tensile testing at 650 oC (a), 700 oC (b), 750 oC (c), and 800 oC (d-g) (The regions enclosed by the black dotted lines in Figs.4a-d represent the crack initiation areas, with the exterior demarcated as the crack propagation areas) (e) crack initiation zone (f, g) crack propagation zones