Role of drawing-induced residual stresses and strains in the hydrogen embrittlement susceptibility of prestressing steels |
| |
Authors: | J Toribio V Kharin M Lorenzo D Vergara |
| |
Affiliation: | Department of Materials Engineering, University of Salamanca, E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain |
| |
Abstract: | Hydrogen embrittlement (HE) of prestressing steel is a major technological problem in damage tolerance and structural integrity of structures in harsh environments, it being strongly influenced by residual stresses and plastic strains after cold-drawing. This paper calculates the distributions of such variables (mechanical approach) and later the stress-and-strain assisted diffusion of hydrogen (chemical approach) in a real manufacturing process by multi-step cold drawing. Results confirm the relevant role of plastic strain in HE of prestressing steel and thus the necessity of considering it in hydrogen diffusion calculations, because stress-only assisted diffusion leads to dramatic (and non conservative) underestimation of the hydrogen content. |
| |
Keywords: | A Prestressing steel A Cold drawing B Numerical modelling C Hydrogen diffusion C Residual stresses C Residual strains |
本文献已被 ScienceDirect 等数据库收录! |