Microstructure and mechanical properties of Mg-8Al alloy fabricated by room-temperature multi-directional forging
Abstract
As-extruded Mg-Al alloy was multi-directionally forged (MDFed) at room temperature to cumulative strain of ΣΔɛ = 2.0 at maximum by employing a pass strain of Δɛ = 0.1. The coarse initial grains were subdivided gradually to ultra-fine ones by mechanical twinning. The MDFed Mg alloy showed superior mechanical properties of 530 MPa yield and 650 MPa ultimate tensile strengths with ductility of 9%. The relatively large ductility was induced by grain orientation randomization due to multiple twinning and the small pass strains which suppressed the sharp basal-texture evolution.
- Publication:
-
Philosophical Magazine Letters
- Pub Date:
- October 2013
- DOI:
- 10.1080/09500839.2013.827800
- Bibcode:
- 2013PMagL..93..601M
- Keywords:
-
- magnesium alloy;
- multi-directional forging;
- twinning;
- ultra-fine grained microstructure;
- mechanical properties