堆垛层错能对CrMnFeCoNi系高熵合金动态力学性能与变形机制的影响

尹仕攀, 孟泽宇, 贺竞瑶, 李泽洲, 张帆, 程兴旺

Effect of Stacking Fault Energy on the Dynamic Mechanical Properties and Deformation Mechanisms of CrMnFeCoNi High-Entropy Alloys

YIN Shipan, MENG Zeyu, HE Jingyao, LI Zezhou, ZHANG Fan, CHENG Xingwang

图8 1 × 10-3 s-1应变率加载条件下，真应变为0.25时，不同堆垛层错能高熵合金变形组织的TEM像、高分辨TEM (HRTEM)像及选区电子衍射(SAED)花样

Fig.8 TEM (a, c) and high resolution TEM (HRTEM) (b1, b2, d) images of the deformed microstructure under quasi-static compression with a strain rate of 1 × 10-3 s-1 and true strain of 0.25 (SF—stacking fault) (a, b1, b2) CrMnFeCoNi HEA (The upper and lower selected area electron diffraction (SAED) patterns in Fig.8a are [011] zone axis parallel and inclined to the optical axis, respectively. Subscripts M and T indicate diffraction spots from matrix and twin, respectively) (c, d) Cr26Mn20Fe20Co20Ni14 HEA (Inset in Fig.8c shows the corresponding SAED pattern)