聚片孪生功能基元序构的高性能TiAl合金

陈光, 陈奉锐, 朱德民, 李贵忠, 李罗, 宋伟东, 王子特, 相恒高, 陈旸, 祁志祥

Polysynthetic Twinned High-Performance TiAl Alloy with Ordered Structures of Functional Units

CHEN Guang, CHEN Fengrui, ZHU Demin, LI Guizhong, LI Luo, SONG Weidong, WANG Zite, XIANG Henggao, CHEN Yang, QI Zhixiang

图1 聚片孪生TiAl合金的功能基元类型[1,15,21,27]

Fig.1 Types of functional units in polysynthetic twinned TiAl alloys (a1, a2) schematic[15] (a1) and TEM image[1] (a2) of α2 phase and γ phase (b) schematic of slip continuity between geometrically favored slip systems in the γ lamella (tetragon) and α2 lamellae (hexagonal prisms) (The white arrows denote the strain energy release routes either across or along the γ/α2 interface)[21] (c1, c2) schematic (c1) and TEM image[1] (c2) of Q-type twins within the γ phase (Arrow shows twins. The same in Figs.1d2 and e2) (d1, d2) schematic (d1) and TEM image (d2) of P + Q-type twins within the γ phase (e1, e2) schematic (e1) and TEM image[27] (e2) of twins within the α2 phase