| Autor: |
Bhovi, Prabhakar M., Patil, Deepak C., Kori, S.A., Venkateswarlu, K., Huang, Yi, Langdon, Terence G. |
| Zdroj: |
Journal of Materials Research and Technology; 20240101, Issue: Preprints |
| Abstrakt: |
A comparative study was conducted to evaluate the influence of two different severe plastic deformation (SPD) processes: repetitive corrugation and straightening (RCS) and high-pressure torsion (HPT). Samples of an Al-3Mg-0.25Sc alloy with an initial grain size of ∼150μm were processed by RCS through 8 passes at room temperature either without any rotation during processing or with a rotation of 90° around the longitudinal axis between each pass. Thin discs of the alloy were also processed for up to 5 turns by HPT at room temperature. The results show that both procedures introduce significant grain refinement with average grain sizes of ∼0.6–0.7μm after RCS and ∼95nm after HPT. Measurements of the Vickers microhardness gave values of ∼128 after RCS and ∼156 after HPT. The results demonstrate that processing by HPT is the optimum processing technique in achieving both high strength and microstructural homogeneity. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
