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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Advanced Characterization Techniques for Quantifying and Modeling Deformation
Presentation Title Rate-Dependent Serration Flow and Mechanical Properties of High Manganese Steel at 15 K
Author(s) Taeho Lee, SooYeol Lee, Chetan Singh, YouSub Kim, JunYun Kang, JunHyun Han, Dong-Hyun Lee
On-Site Speaker (Planned) SooYeol Lee
Abstract Scope Advancements in liquid nitrogen and hydrogen industries, driven by emission regulations and fossil fuel restrictions, require the liquefaction, transportation, and storage of gases at temperatures between 20 K and 77 K. However, most metals undergo a ductile-to-brittle transition at low temperatures, leading to catastrophic failure with quasi-cleavage fracture. Moreover, discontinuous tensile curves or serrations, indicating abrupt localized deformation, have commonly been observed at ultra-low temperatures of ~20 K. In this study, we extend the exploration of high-manganese steel, focusing on its TWIP deformation mechanism and discontinuous serration flow under various strain rates at liquid hydrogen temperature of 15 K. Tensile tests of high-manganese steel at 15 K with varying strain rates were conducted to: 1) evaluate mechanical properties, 2) investigate changes in serration behavior, and 3) elucidate microstructural mechanisms. The current study discusses the applicability of high manganese steel for liquid hydrogen industry.
Proceedings Inclusion? Planned:
Keywords Iron and Steel, Mechanical Properties,

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