层错能对面心立方金属形变机制与力学性能的影响

张哲峰, 李克强, 蔡拓, 李鹏, 张振军, 刘睿, 杨金波, 张鹏

Effects of Stacking Fault Energy on the Deformation Mechanisms and Mechanical Properties of Face-Centered Cubic Metals

ZHANG Zhefeng, LI Keqiang, CAI Tuo, LI Peng, ZHANG Zhenjun, LIU Rui, YANG Jinbo, ZHANG Peng

图2 fcc金属滑移与形变孪生竞争示意图[24,25]

Fig.2 Schematic illustrations for competition of slipping and twining (a) projection of fcc structure on the (111) plane[25] ( b —Burgers vector, bp1 and bp2—partial Burgers vectors) (b) generalized stacking fault energy (GSFE) variation with a complete slipping[24] (γusf—unstable stacking fault energy, γisf—instinsic stacking fault energy) (c) GSFE variation with deformation twinning[24] (γutf—unstable twinning fault energy)