Scanning Kelvin probe force microscopy study on hydrogen distribution in austenitic stainless steel after martensitic transformation

Scanning Kelvin probe force microscopy study on hydrogen distribution in austenitic stainless steel after martensitic transformation
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扫描开尔文探针力显微镜研究奥氏体不锈钢马氏体相变后的氢分布

DOI:
10.1016/j.matlet.2019.02.089
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发表时间:
2019-06
期刊:
影响因子:
3
通讯作者:
Zheng Jinyang
Zheng Jinyang
中科院分区:
材料科学3区
文献类型:
--
作者:
Hua Zhengli;Zhu Shengyi;Shang Juan;Cheng Guangxu;Yao Yanchen;Zheng Jinyang

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亚稳奥氏体不锈钢(γ-SS)的氢脆主要是由马氏体(γ ′)引起的。然而,对于γ-SS中马氏体相变后氢的聚集位置仍存在争议。采用扫描Kelvin探针力显微镜(SKPFM)结合有限元分析(FEA)研究了预充氢γ-不锈钢马氏体相变后氢的分布和演化。结果表明,在α′相形成后,氢在α′相附近的奥氏体(γ)中积累。随着氢向γ中扩散,α′引起的γ中氢浓度峰值先增大后减小。
Martensite (α’) usually plays an important role in the hydrogen embrittlement (HE) of metastable austenitic stainless steels (γ-SS). However, there is still controversy about the location of hydrogen accumulation after martensitic transformation in γ-SS. Scanning Kelvin probe force microscopy (SKPFM) combined with finite element analysis (FEA) have been used to study the hydrogen distribution and evolution in hydrogen-precharged γ-SS after martensitic transformation. It is found that hydrogen accumulates in austenite (γ) adjacent to α′ after the formation of α′. The peak of hydrogen concentration in γ induced by α′ increases first and then decreases as hydrogen diffuses further into γ.
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