Simulation of Hydrogen Diffusion in Duplex Stainless Steel

被引：0
|
作者：
Tao P. [1 ,2 ]
Wang Y. [3 ]
Gong J. [1 ,2 ]
Wu W. [1 ,2 ]
Liang T. [1 ,2 ]
机构：
[1] School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing
[2] Jiangsu Key Laboratory of Design and Manufacture of Extreme Pressure Equipment, Nanjing Tech University, Nanjing
[3] School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2018年 / 52卷 / 09期
关键词：
Diffusion coefficient; Duplex stainless steel (DSS); Hydrogen diffusion; Volume fraction;
D O I：
10.16183/j.cnki.jsjtu.2018.09.012
中图分类号：
学科分类号：
摘要：
Duplex stainless steels (DSS) are subjected to a deleterious effect known as hydrogen embrittlement. Due to the difference of the ratio of various alloying elements and the influence of processing technology, the volume fraction of austenite phase (φγ) will be changed. Hydrogen diffusion models with different φγ were established based on transient finite element mass diffusion in program-Abaqus. In addition, the discrepancies of hydrogen diffusion in both transverse and longitudinal microstructure were implemented. After the simulation analysis, the apparent diffusion coefficients (Dapp) of the models were calculated. The results show that Dapp decreased with the increase of φγ, and there is a linear relationship between ln Dapp and φγ; the values of hydrogen diffusion coefficient are greater when the elongated austenite is orientated parallel with the direction of hydrogen flux, i.e. the transverse samples are more susceptible to hydrogen embrittlement than longitudinal samples. © 2018, Shanghai Jiao Tong University Press. All right reserved.
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页码：1086 / 1091
页数：5
相关论文
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