About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Metal Nanostructuring by High-Pressure Torsion: Defect-Induced Microstructure Characterization |
| Author(s) |
Megumi Kawasaki, Laxman Bhatta, Klaus-Dieter Liss |
| On-Site Speaker (Planned) |
Megumi Kawasaki |
| Abstract Scope |
Metal processing by high-pressure torsion (HPT) offers a powerful route to produce bulk nanostructured metals. A key advantage of HPT is its ability to induce extreme shear strain under hydrostatic pressure, enabling the refinement of microstructure even in hard-to-deform engineering materials at ambient temperatures and within short processing times. HPT-processed nanocrystalline metals typically exhibit enhanced mechanical properties and functionality. Recent interest has focused on applying HPT to complex concentrated alloys, such as high-entropy alloys (HEA), to further exploit their potential for superior performance. This presentation highlights recent studies on the evolution of major crystalline defects in face-centered cubic HEA processed by HPT, along with their post-deformation mechanical behavior. Special attention is paid to the radial variation of residual lattice strains in ultrafine-grained Ni-based alloys after HPT processing, highlighting the role of processing-induced residual stresses. These findings underscore the critical importance of residual stress management in advanced manufacturing and materials design. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Process Technology, Mechanical Properties |