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5 不同总应变幅循环加载后8和60 μm晶粒尺寸的Fe-22Mn-3Al-0.6C TWIP钢疲劳裂纹扩展区形貌的SEM像

Fig.5 SEM images of crack propogation zones in Fe-22Mn-3Al-0.6C TWIP steels with grain sizes of 8 μm (a, b) and 60 μm (c, d) after cyclic loading with total strain amplitudes of 0.3% (a, c) and 1.0% (b, d) (d—fatigue striation spacing)