Journal
ADVANCED ENGINEERING MATERIALS
Volume 18, Issue 9, Pages 1683-1689Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adem.201600219
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Funding
- National Natural Science Foundation of China [11332013, 51405396]
- China Postdoctoral Science Foundation [2015M572429, XM2015058]
- Chongqing Postdoctoral Science Foundation [2015M572429, XM2015058]
- Natural Science Foundation of Guizhou Province [[2015] 2067]
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In this study, the effects of torsion strain and strain rate on microstructure and hardening behavior of extruded AZ31 Mg alloy rods are investigated. Torsion deformation can generate abundant extension twins and dislocations and cause the rotation of c-axis toward extrusion direction. These microstructures exhibit gradient distributions along the radial direction of torsion-deformed rods. Torsion deformation can effectively enhance the hardness of AZ31 rods. The gradient microstructure leads to a gradient hardness distribution in torsion-deformed rods. High strain rates can enhance the hardening effect via torsion deformation by promoting increment of dislocation density.
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