In-situ generation process and properties of nanocrystalline layer in bainitic steel surface during rolling contact

Chunlei Zheng,Yupeng Zhang, Shuoyan Li,Peijun Zhang,Jinku Yu,Fucheng Zhang

Materials Letters（2023）

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摘要

•Surface undergoes a cyclic process of in-situ NL generation-stripping-generation.•The NL effectively hinder the fatigue crack propagation to the deep.•The decrease of elastic modulus indicates that bainitic steel begins to damage.•The strengthening of surface deformation layer is accompanied by damage.

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关键词

Fatigue,Surface,Phase transformation,Nanocrystalline materials,Indentation and hardness

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