Experimental and numerical analysis of hydrogen diffusion behaviors in an ultra-fine bainitic steel

被引：8

作者：

Cheng, Lin ^{[1
,2
]}

Yang, Bangshu ^{[1
]}

Wu, Yajie ^{[1
]}

Zhang, Xian ^{[1
]}

Liu, Jing ^{[1
]}

Zhang, Guohong ^{[1
,2
]}

Wu, Kaiming ^{[1
,2
]}

机构：

[1] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Syst Sci Met Proc, State Key Lab Refractories & Met, Int Res Inst Steel Technol,Collaborat Ctr Adv Ste, Wuhan 430081, Peoples R China

[2] Met Valley & Band Foshan Metall Composite Mat Co, Foshan 528000, Guangdong, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 46期

基金：

中国国家自然科学基金;

关键词：

Hydrogen diffusion; Hydrogen permeation; Bainitic steel; Retained austenite; Numerical simulation; IRON-ALLOYS CHARACTERIZATION; RETAINED AUSTENITE; EMBRITTLEMENT RESISTANCE; PERMEATION EXPERIMENTS; ACCESSIBLE PARAMETERS; INDUCED CRACKING; TRANSPORT; FRACTURE; SIMULATION; SUSCEPTIBILITY;

D O I：

10.1016/j.ijhydene.2020.06.206

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure and hydrogen diffusion behavior of a typical high carbon bainitic steel experienced two different heat treatment history were firstly examined by optical microscope, scanning electron microscope and electrochemical hydrogen permeation test. Hydrogen diffusivity in this investigated steel lies in between those of the pure iron or mild steels and austenitic steels. The underlying mechanism is that although hydrogen diffusion in bainitic ferrite dominated hydrogen transport, percolation effect of the retained austenite as well as its tortuosity effect can significantly decrease hydrogen effective diffusivity and permeability, which was further verified by simplified formulas and models solved by numerical simulation. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：25493 / 25508

页数：16

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