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3 序构参数对力学性能的影响[21,33,34]

Fig.3 Influences of ordered structure parameters on mechanical properties (a1-a4) intrinsic plastic deformation properties (a1) and microstructures related to the lamellar internal orientations of 0° (a2), 45° (a3), and 90° (a4)[21] (UTS—ultimate tensile strength) (b1-b4) mechanical properties (b1) and microstructures[33] (b2-b4) of nanoscale α2 + O phase modulated by 625 oC and 5 h heat treatment and then air cooling (AC) (HIP—hot isostatic pressing; red arrow in Fig.3b3 shows nanoscale preci-pitated O phase; T1 and T2 in Fig.3b4 show twin 1 and twin 2, respectively) (c1-c4) mechanical properties (c1) and EBSD images[34] (c2-c4) after cyclic regulation of the two-phase ratios (c2) initial state (c3) annealed at 1373 K for 6 h (c4) annealed at 1613 K for 6 h