高熵合金跨尺度异构强韧化及其力学性能研究进展

安子冰, 毛圣成, 张泽, 韩晓东

Strengthening-Toughening Mechanism and Mechanical Properties of Span-Scale Heterostructure High-Entropy Alloy

AN Zibing, MAO Shengcheng, ZHANG Ze, HAN Xiaodong

图11 CoCrNi合金晶粒异构显微结构及异构结构中的异构变形诱导硬化[46]

Fig.11 Microstructure and hetero-deformation induced (HDI) hardening of CoCrNi alloy[46] (a) EBSD and TEM image of CoCrNi alloy (LAGB—low angle grain boundary, HAGB—high-angle grain boundary, TB—twin boundary, UFG—ultrafine-grained) (b) true stress-strain curves during LUR (loading-unloading-reloading) tests at 298 K and 77 K. Hysteresis loops at the maximum uniform strain. Comparison of HDI hardening with the total strain hardening in the CoCrNi alloy at 298 K and 77 K (εrp—reverse plastic strain, σf—flow stress, σ0.2—yield stress, σb—back stress, σb, 0.2—back stress at yielding) (c) TEM image of the deformed CoCrNi alloy (NG—nanograin)