| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
N-27: Effect of Severe Plastic Deformation on Mechanical Properties of Al6061 |
| Author(s) |
Vagish Datta Mishra, Karthik Palaniappan, Balkrishna C. Rao, Murthy H. |
| On-Site Speaker (Planned) |
Vagish Datta Mishra |
| Abstract Scope |
Large plastic deformation through cold-rolling refines microstructure through accumulation of plastic strains over multiple stages. Machining achieves similar large plastic strains (1-10) in a single stage to produce ultra-fine-grained chips. Effect of cold-rolling and machining on microstructure and mechanical properties of Al6061 was investigated. As-received, solution heat-treated and peak-aged plates were cold-rolled to 30%, 50% & 70% thickness reductions. Ultra-fine-grained chips were produced from low-speed orthogonal-machining under plane-strain condition, using restricted contact tool to minimize the chip curvature.
Grains were equiaxed in as-received, solution-heat-treated and peak-aged samples, while they were elongated in cold-rolled bulk. In chips, grains were elongated in one direction due to severe plastic flow. Hardness and ultimate tensile strength increased with thickness reduction. Chip hardness is 60% more than as-received material due to microstructure refinement. Metal cutting (single-stage process) and >50% thickness reduction by cold-rolling (multi-stage) provide nearly same enhancement in mechanical properties (40% more than bulk). |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |