EFFECTS OF MANUFACTURING-INDUCED RESIDUAL STRESSES AND STRAINS ON HYDROGEN EMBRITTLEMENT OF COLD DRAWN STEEL

摘要：

Hydrogen embrittlement (HE) plays a relevant role in the performance of prestressing steel wires. In this framework, the knowledge of residual stresses and plastic strains in wires due to cold-drawing (manufacturing-induced residual stresses), as well as of wires hydrogenation from harsh environments are the keys to successful predictions of wire lives. This paper advances previous analyses of HE in cold-drawn prestressing wires via numerical modelling, first, of the cold-drawing process to gain the distributions of residual stresses and plastic strains, and next, of the stress-strain assisted hydrogen diffusion in wires towards creation the conditions for HE nucleation. Generated results prove the relevant role of residual stress-andstrain field in hydrogen diffusion in the wires, as well as their possible consequences for HE.

作者: J. Toribio M. Lorenzo D. Vergara V. Kharin

作者单位: Department of Materials Engineering, University of Salamanca, EPS, Campus Viriato, Avda Requejo 33, Department of Materials Engineering, University of Salamanca

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）