The finding of crystallographic orientation dependence of hydrogen diffusion in austenitic stainless steel by scanning Kelvin probe force microscopy
The finding of crystallographic orientation dependence of hydrogen diffusion in austenitic stainless steel by scanning Kelvin probe force microscopy
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DOI：
10.1016/j.scriptamat.2017.01.003
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发表时间：
2017-04-01
影响因子：
6
通讯作者：
Zheng, Jinyang
中科院分区：
文献类型：
--
作者：
Hua, Zhengli;An, Bai;Zheng, Jinyang
采用扫描开尔文探针力显微镜（SKPFM）和电子背散射衍射（EBSD）相结合的方法研究了热预充氢304型奥氏体不锈钢（gamma-SS）的氢释放过程。接触电位差（CPD）的变化很好地反映了近表面氢浓度的变化。首次发现氢在γ-SS中的扩散系数与晶体取向有关。氢从（001）和（101）晶粒向外扩散的速度比从（111）晶粒向外扩散的速度快，但（001）和（101）晶粒之间没有明显差异。(C)2017 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
A combination of scanning Kelvin probe force microscopy (SKPFM) and electron backscatter diffraction (EBSD) has been applied to investigate the hydrogen release from thermally hydrogen-precharged type 304 austenitic stainless steel (gamma-SS). The evolution of contact potential difference (CPD) well exhibits the evolution of hydrogen concentration in the near surface area. It is found for the first time that the hydrogen diffusivity in gamma-SS depends on the crystallographic orientation. The hydrogen diffusion out from (001) and (101) grains is faster than from (111) grains while no obvious difference is found between (001) and (101) grains. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.