Effect of prestrain on hydrogen diffusion and trapping in structural steel

被引：41

作者：

Parka, Cheolho ^{[1
]}

Kang, Namhyun ^{[1
]}

Kim, Myunghyun ^{[2
]}

Liu, Stephen ^{[3
]}

机构：

[1] Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea

[2] Pusan Natl Univ, Dept Naval Architecture & Ocean Engn, Busan 46241, South Korea

[3] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA

来源：

MATERIALS LETTERS | 2019年 / 235卷

基金：

新加坡国家研究基金会;

关键词：

Steel; Electrochemical permeation; Prestrain; Hydrogen embrittlement; Hydrogen diffusion; Hydrogen trapping; AUSTENITIC STEEL; GRAIN-BOUNDARIES; SUSCEPTIBILITY; EMBRITTLEMENT; DEFORMATION; SEGREGATION; METALS;

D O I：

10.1016/j.matlet.2018.10.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hydrogen permeation tests were electrochemically performed to measure hydrogen diffusion and trapping in EH 36 steel. Permeation transients were measured through charging and decaying cycles, for specimens prestrained to varying degrees (0-20%). With increasing prestrain, the effective hydrogen diffusivity (D-eff) decreased, while the total/reversible hydrogen content (C-o and C-r, respectively) increased. The immobile dislocation of the 20%-prestrained specimens decreased D-eff by approximately ten times and increased C-o and C-r by approximately three times. The amount of irreversibly trapped hydrogen (C-irr) remained approximately the same, regardless of the prestrain. The dislocations delay the motion of hydrogen and contain more reversible hydrogen. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：193 / 196

页数：4

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