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Meeting 2024 TMS Annual Meeting & Exhibition
Symposium Ultrafine-grained and Heterostructured Materials (UFGH XIII)
Presentation Title Cryogenic Mechanical Properties of the Equal-channel Angular Pressed High-Mn Steel
Author(s) Young Hoon Jung, Beom Joon Kim, Hyeonseok Kwon, Marina Abarmova, Hyoung Seop Kim, Nariman Enikeev, Jung Gi Kim
On-Site Speaker (Planned) Jung Gi Kim
Abstract Scope Since cryogenic environment reduces the toughness of metallic alloys, sustaining in ultra-cryogenic environment becomes one of the important issues. Thus, many research groups tried to overcome this issue by grain refinement that conserves the ductility even in the low temperature. Although the authors’ previous work revealed strength enhancement at 77 K after severe plastic deformation, relatively coarse grain after casting induces strain localization. Thus, in this work, the cryogenic mechanical properties of the equal-channel angular pressed high-Mn steel after homogenization has been investigated. Because of the large shear deformation from multiple pass equal-channel angular pressing, ultrafine-grained matrix with ~ 800 nm was observed. By combining grain refinement and stacking fault energy reduction, the mechanical properties of equal-channel angular pressed high-Mn steel represented outstanding strength-ductility combination. This result represents the severe plastic deformed steel can sustain at cryogenic conditions, which specimens can be applied to arctic or hydrogen industries.
Proceedings Inclusion? Planned:
Keywords Mechanical Properties, Iron and Steel, Process Technology


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