The effect of low temperature heat treatment on stress corrosion crack initiation in machined 316L stainless steel in high-temperature hydrogenated water. (1st April 2021)

• Record Type: Journal Article
• Authors: Chang, Litao; Mukahiwa, Kudzanai; Duff, Jonathan; Burke, M. Grace; Scenini, Fabio
• Is Part Of: Scripta materialia. Number 195(2021)
• Publication Date: 2021-04-01
• Subjects: Ultrafine-grains -- Austenitic stainless steel -- Heat treatment -- Stress corrosion cracking -- High-temperature water; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2021.113742
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A notable reduction of the stress corrosion cracking (SCC) initiation susceptibility was identified for machined cold-rolled 316L stainless steel that received a 650°C/10 hours heat-treatment prior to slow strain rate tensile (SSRT) testing in high-temperature hydrogenated water. The cracks per unit area of the machined surface of heat-treated specimens decreased by ~50% compared to as-machined surfaces, and by >70% with respect to polished surfaces. The results were ascribed to recrystallization of the ultrafine-grains present in the outer deformation layer of the machined surface, which resulted in a reduction of the tensile residual stress and nano-indentation hardness. Graphical abstract: Image, graphical abstract