The effect of basal dislocation on 112¯1 twin boundary evolution in a Mg-Gd-Y-Zr alloy
| Autor: | Xixi Qi, Yangxin Li, Peipeng Jin, Jinhui Wang, Yuxuan Liu, Gaoming Zhu, Xiaoqin Zeng, Qingchun Zhu, Huan Zhang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Condensed matter physics Misorientation Mg alloys Mechanical Engineering Metals and Alloys 02 engineering and technology Strain rate 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Mechanics of Materials Transmission electron microscopy Materials Chemistry Ceramics and Composites Dislocation Deformation (engineering) 0210 nano-technology Crystal twinning Electron backscatter diffraction |
| Zdroj: | Journal of Materials Science & Technology. 81:212-218 |
| ISSN: | 1005-0302 |
| Popis: | This study aims to understand the features of 11 2 ¯ 1 twin boundaries in a high strain rate compressed Mg-10Gd-3Y-0.4Zr using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). Based on the Schmid factor calculations, the basal dislocations are easily activated within the 11 2 ¯ 1 twin and suppressed in the surrounding matrix. The consequent basal dislocation-twin interaction during deformation can lead to the misorentiation deviation of 11 2 ¯ 1 twin boundaries, accompanying with the formation of a step at the twin boundary. Such a 11 2 ¯ 1 twin boundary evolution mechanism provides a new vision of twinning behavior in Mg alloys. |
| Databáze: | OpenAIRE |
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