About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
Hydrogen Charging Behavior of Gradient Structured High-Mn Steels |
Author(s) |
Jung Gi Kim, Hyun Joo Seo, Jeong Min Park, Seung Mi Baek, Auezhan Amanov, Chong Soo Lee, Hyoung Seop Kim |
On-Site Speaker (Planned) |
Jung Gi Kim |
Abstract Scope |
Hydrogen embrittlement of high strength steel is one of the critical issue when attempting to prolong the material life for a practical use. Because of this reason, microstructural design for a prevention of hydrogen invasion is important to enhance hydrogen embrittlement resistance of materials. In the present work, ultrasonic nanocrystalline surface modification (UNSM) treatment at elevated temperature was conducted to the high-Mn steel. Both nanocrystalline layer and compressive residual stress at the surface region of the UNSM treated high-Mn steel not only provide additional strength, but also prevent hydrogen invasion on the surface that reduces hydrogen localization in the defects. These beneficial effects enhance the mechanical property in a hydrogen-containing environment of the UNSM-treated high-Mn steel. This result proves designing heterogeneous microstructure in high-strength steel can be a good strategy to improve both strength-ductility combination and prolonged life time in a hydrogen-rich environment. |
Proceedings Inclusion? |
Planned: |