About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
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Presentation Title |
Multi-layered Gradient Structure by Single-roll Angular-rolling and Ultrasonic Nanocrystalline Surface Modification |
Author(s) |
Hyoung Seop Kim, Hak Hyeon Lee, Hyung Keun Park, Jaimyun Jung, Auezhan Amanov |
On-Site Speaker (Planned) |
Hyoung Seop Kim |
Abstract Scope |
In this presentation, we fabricate a new type of gradient structure using sequential processing of two advanced severe plastic deformation methods, single-roll angular-rolling and ultrasonic nanocrystalline surface modification, which refine microstructures mainly on the core and surface of a metallic sheet, respectively. This material with a multi-layered grain size gradient in the thickness direction features impressive strength-toughness synergy beyond the initial and reverse gradient-structured materials. The superiority is attributable to hetero-deformation induced mechanisms that originate from microstructural heterogeneity. Ultimately, this work suggests a new processing approach by which a strength-toughness window saturated at a certain level in gradient-structured materials can be extended. |
Proceedings Inclusion? |
Planned: |