About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-Grained and Heterostructured Materials (UFGH) XIV
|
| Presentation Title |
Tunable Gradient Heterostructuring by Single-Roll Angular-Rolling |
| Author(s) |
Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Hyoung Seop Kim |
| Abstract Scope |
Gradient heterostructures offer a promising strategy to overcome the strength–ductility trade-off in metals. We present a novel continuous severe plastic deformation method—Single-Roll Angular-Rolling (SRAR)—that enables tunable gradient polarity in metallic sheets. By combining circumferential and angular shear deformation, SRAR allows precise control of through-thickness strain distribution, forming either fine-core/coarse-surface or fine-surface/coarse-core architectures. Experimental results using high-purity Cu demonstrate enhanced mechanical performance, including simultaneous improvements in strength and ductility. Finite element modeling and micro-scale strain mapping confirm that strain partitioning and geometrically necessary dislocation accumulation contribute to significant back-stress hardening. This work establishes SRAR as a versatile, scalable platform for gradient microstructure design in sheet metals. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Shaping and Forming, Mechanical Properties, Modeling and Simulation |