Low Cycle Fatigue Behavior and Deformation Mechanism of TWIP Steel

Yanxin、Wu、Di、Tang、Haitao、Jiang 、Zhen-li、Yao

2014Acta Scientiarum Naturalium Universitatis SunyatseniEngineering被引 4

摘要

Low cycle fatigue behavior of TWIP(twinning induced plasticity)steel was investigated in axial symmetric tension-compression cyclic loading pattern.Fracture surfaces and microstructures were examined by optical,scanning electron and transmission electron microscopes.It was found that the fatigue life at the strain amplitude of0.4%is up to 15 000cycles,which is much longer than TRIP780and HSLA800steels.The strain hardening and softening features are significant until the strain amplitude comes to 1.25%.Persistent slip bands and tiny mechanical twinning layers were observed after fatigue deformation.Deformation mechanism of TWIP steel at low cycle fatigue process is not only twinning,but a complex of both twinning and persistent slip bands.

引用本文（GB/T 7714）

Yanxin, Wu, Di, 等. Low Cycle Fatigue Behavior and Deformation Mechanism of TWIP Steel[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2014.

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