1. Exploring the hydrogen embrittlement behavior in nickel-economized austenitic stainless steel: Investigating the role of manganese in modifying hydrogen-induced crack mechanisms.
- Author
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Mao, L.Y., Luo, Z.A., Huang, C., Zhou, H.Y., and Zhang, X.M.
- Subjects
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AUSTENITIC stainless steel , *HYDROGEN embrittlement of metals , *STAINLESS steel , *MANGANESE , *MATERIAL plasticity , *EMBRITTLEMENT , *STRAIN rate - Abstract
The hydrogen embrittlement (HE) susceptibility in nickel-economized austenitic stainless steels (NEASSs) with varying manganese content was explored based on the statistical results of hydrogen-induced cracks (HICs) characterization after slow strain rate tensile (SSRT). With almost the same initial microstructure, manganese modifies the deformation patterns of NEASSs by adjusting stacking fault energy, which essentially influences the initiation and propagation mechanisms of HICs and eventually results in different brittle fracture modes. Additionally, different ways of HIC initiation and propagation caused significant differences in brittle-fracture areas and HICs lengths after SSRT tests, which resulted in great variations in HE susceptibility between NEASSs. [Display omitted] • The hydrogen-induced cracking behavior in nickel-economized austenitic stainless steels is systematically explained. • A Higher Mn alloying leads to a lower strength/elongation loss in NEASSs. • The hydrogen embrittlement performance of NEASS is essentially influenced by its deformation mode during SSRT tests. • The fracture mode of the brittle-fracture zone is determined by the initiation and propagation behavior of HICs • For NEASSs with plastic deformation dominated by dislocation slip exhibit lower HE susceptibility. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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