The effect of martensite on stress corrosion crack initiation of austenitic stainless steels in high-temperature hydrogenated water. (15th August 2021)

• Record Type: Journal Article
• Authors: Chang, Litao; Burke, M. Grace; Mukahiwa, Kudzanai; Duff, Jonathan; Wang, YongLiang; Scenini, Fabio
• Is Part Of: Corrosion science. Volume 189(2021)
• Publication Date: 2021-08-15
• Subjects: Austenitic stainless steel -- Martensitic transformations -- SCC initiation -- High-temperature water -- SSRT; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2021.109600
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Martensite oxidized much faster than austenite in high-temperature hydrogenated water. The oxide which formed by the consumption of martensite were porous. The presence of strain-induced martensite reduced the SCC initiation susceptibility. Abstract: Cold-worked Type 304L/316L stainless steel specimens, which contained different amounts of martensite (α′/ε), were tested in high-temperature hydrogenated water under slow strain rate tensile (SSRT) test conditions to understand the role of martensite on stress corrosion crack (SCC) initiation. These specimens were characterized prior to and after SSRT tests using complementary analytical techniques. It was observed that a higher strain was necessary to induce SCC initiation for cold-rolled 304L that contained martensite compared to the other cold-worked stainless steels that did not contain martensite. The mechanisms responsible for different SCC initiation susceptibilities of the steels were discussed based on the experimental observations.