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3 不同fcc金属在α-β坐标系内从滑移过渡到形变孪生的能力比较[25]

Fig.3 Illustration presents the transition from slipping to twinning for various fcc metals in α-β coordinate system (ϕ—angle from α + β = 2, α = γisf / γusf and β = γutf / γusf. The black line is a critical boundary, under which those metals or alloys can form deformation twinning (DT) by the twinning deformation mechanism, while over which these metals or alloys are very difficult to form DT. α + β = 2 is the critical criterion for the two competitive mechanisms between deformation twinning and slipping)[25]