Evolution of the Plastic Deformation Mechanisms in a Compressed Mg-10Gd-2Y-0.5Zr Alloy
| Periodical | Advanced Materials Research (Volume 510) |
|---|---|
| Main Theme | Machinery, Materials Science and Engineering Applications |
| Edited by | Quanjie Gao |
| Pages | 628-633 |
| DOI | 10.4028/www.scientific.net/AMR.510.628 |
| Citation | Qing Yu Hou et al., 2012, Advanced Materials Research, 510, 628 |
| Online since | April, 2012 |
| Authors | Qing Yu Hou, Jing Tao Wang, Zhen Yi Huang |
| Keywords | Deformation Mechanism, Dynamic Recrystallization, Mg-Gd-Y Alloy, Rietveld Refinement, Transformation Band, Twinning |
| Price | US$ 28,- |
This paper investigates the evolution of the deformation mechanisms in a homogenized Mg-10Gd-2Y-0.5Zr alloy ingot compressed at 300-500 oC and 0.1-20 s-1. It can be found that the basal slip and mechanical twinning are the major deformation mechanisms in the alloy compressed at 300 and 0.1-20 s-1. Increasing the testing temperature to 350 oC, basal slip, non-basal slip and mechanical twinning control the plastic deformation of the alloy compressed at 0.1-20 s-1. When the testing temperatures increase further to 400-500 oC, the mechanical twinning is replaced gradually by the local shear bands which are formed by dynamic recrystallization (DRX) grains (referred as transformation bands). The transformation bands have the trend to form the typical DRX microstructure with increasing the temperatures (might be caused by increasing testing temperatures or strain rates). Besides, the transformation bands can also be found in the sample compressed at 350 oC and 20 s-1 when the temperature in the deformation alloy is high enough to activate non-basal slip and form DRX grains at local zone.
