Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1622090 | Journal of Alloys and Compounds | 2009 | 5 Pages |
Abstract
Superplastic behavior and microstructure of the rolled Mg–Gd–Y–Zr alloy sheet with an initial grain size of 66 μm were investigated. For the purposes, tensile tests at various temperatures and strain rates were conducted, which revealed that the sheet exhibited a maximum elongation of 380% at 435 °C and 0.0005 s−1. The high ductility was attributed to grain boundary sliding accommodated by dislocation motion assisted by lattice diffusion. It is suggested from microstructural analysis results that the second phases exhibited the significant effect of pinning grain boundaries, and that the β phase was deformed and the strain was partly transferred from the matrix to the β phase.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Li Li, Xinming Zhang, Yunlai Deng, Changping Tang,