The influence of hydrogen flux on crack initiation in martensitic steels

被引：6

作者：

Guedes, D. ^{[1
,2
]}

Oudriss, A. ^{[1
]}

Cohendoz, S. ^{[1
]}

Creus, J. ^{[1
]}

Bouhattate, J. ^{[1
]}

Feaugas, X. ^{[1
]}

Thebault, F. ^{[2
]}

Koschel, D. ^{[2
]}

机构：

[1] Univ La Rochelle, LaSIE CNRS FRE 3474, Ave Michel Crepeau, F-17042 La Rochelle 0, France

[2] Vallourec Res Ctr France, 60 Route Leval, F-59620 Aulnoye Aymeries, France

来源：

20TH EUROPEAN CONFERENCE ON FRACTURE | 2014年 / 3卷

关键词：

martensitic steel; hydrogen mobilty; deep trapping of hydrogen; crack initiation; hydrogen embrittlement; local approch of fracture; BEHAVIOR; STRESS; THERMODYNAMICS; EMBRITTLEMENT; DEFORMATION; DIFFUSIVITY; SOLUBILITY; SOLIDS; METALS; NICKEL;

D O I：

10.1016/j.mspro.2014.06.326

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Understanding hydrogen transport and trapping phenomena is a key feature to revisit the hydrogen embrittlement (HE) models proposed in the literature. Both aspects can be affected by stress-strain states at different microstructural scales. Elastic distortion and plastic strain are both aspects of the mechanical states associated with defects (vacancies, dislocations), metallurgical elements (grain boundaries, precipitates), internal stresses and applied stresses, which can modify the diffusion and solubility of hydrogen. In the present work we first explore the effects of a tensile stress applied on martensitic steel membrane on the hydrogen concentration and mobility. In a second part, we analyse the impact of mobile and trapped hydrogen on HE using local approach of fracture under hydrogen flux. (C) 2014 Published by Elsevier Ltd.

引用

页码：2024 / 2029

页数：6

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