Influence of residual stresses and strains generated by cold drawing on hydrogen embrittlement of prestressing steels

被引：25

作者：

Toribio, J. ^{[1
]}

Kharin, V. ^{[1
]}

Vergara, D. ^{[1
]}

Blanco, J. A. ^{[1
]}

Ballesteros, J. G. ^{[1
]}

机构：

[1] Univ Salamanca, Dept Mat Engn, EPS, Zamora 49022, Spain

来源：

CORROSION SCIENCE | 2007年 / 49卷 / 09期

关键词：

steel; effects of strain; hydrogen embrittlement;

D O I：

10.1016/j.corsci.2007.03.027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hydrogen embrittlement plays an important role in environmental cracking of prestressing steel wires. The ammonium thiocyanate test (ATT) was implemented as a standard for determination of their susceptibility to environmentally assisted fracture. However, ATT reveals neither how hydrogen induced fracture (HIF) goes on in steel nor the roles of important manufacturing and service factors. To this end, the knowledge of the residual stresses and plastic strains in wires due to cold drawing, as well as the hydrogenation from harsh environments, are the keys to successful predictions of wire lives. This paper advances previous analyses of HIF in cold drawn prestressing wires via numerical modelling, firstly, of the cold drawing process to obtain the distributions of residual stresses and plastic strains, and secondly, of the stress-strain assisted hydrogen diffusion in wires towards creation the conditions for HIF nucleation. Generated results prove the relevant role of residual stress-and-strain field in hydrogen diffusion in the wires, as well as their possible consequences for HIF. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3557 / 3569

页数：13

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