晶粒尺寸对Fe-Mn-Al-C系第三代TWIP钢低周疲劳性能的影响

韩婧, 邵琛玮, 邱子浩, 张振军, 张哲峰

Effect of Grain Size on Low-Cycle Fatigue Properties of an Fe-Mn-Al-C Third Generation TWIP Steel

HAN Jing, SHAO Chenwei, QIU Zihao, ZHANG Zhenjun, ZHANG Zhefeng

图7 不同总应变幅循环加载后60 μm晶粒尺寸的Fe-22Mn-3Al-0.6C TWIP钢典型位错结构的TEM像

Fig.7 TEM images of typical dislocation structures in large-grain (60 μm) Fe-22Mn-3Al-0.6C TWIP steels after cyclic loading with total strain amplitudes of 0.3% (a, b) and 1.0% (c, d) (DB—dislocation band. Inset in Fig.7d shows the selected area electron diffraction (SAED) patterns of twin and matrix)