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4 0.3%总应变幅循环加载后8和60 μm晶粒尺寸的Fe-22Mn-3Al-0.6C TWIP钢疲劳断口宏观形貌

Fig.4 Macro morphologies of fracture of Fe-22Mn-3Al-0.6C TWIP steels with grain sizes of 8 μm (a) and 60 μm (b) after cyclic loading with total strain amplitude of 0.3% (The directions of the arrows indicate the propagation directions of the fatigue crack, I—fatigue source zone, II—fatigue crack propagation zone, III—fatigue fracture zone)