Abstract
Ultrafine-grained structure in Mg-Zn-Y-Zr alloy was achieved towards extraordinary superplasticity induced by friction stir processing. Grain refinement and homogeneous dispersion of precipitates were promoted by the coupled thermo-mechanical effect. The ultra-fined grains size of 1.9 ± 0.4 μm and the superplastic elongation of 642% were obtained. Grain boundary sliding was considered as the predominant superplastic deformation mechanism in ultrafine-grained materials.
Original language | English |
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Article number | 130524 |
Journal | Materials Letters |
Volume | 303 |
DOIs | |
State | Published - 15 Nov 2021 |
Externally published | Yes |
Keywords
- Metals and alloys
- Microstructure
- Recrystallization
- Severe plastic deformation
- Superplasticity