Effects of Mg concentration on the quasi-superplasticity of coarse-grained Al-Mg alloys
- Hong-Ik Univ., Seoul (Korea, Republic of). Dept. of Metallurgy and Materials Science
- Hanyang Univ., Ansan (Korea, Republic of). Dept. of Metallurgy and Materials Science
Superplastic metallic alloys have the capability to yield very large tensile elongations under optimum conditions. It is generally accepted that grain boundary sliding (GBS) accommodated by slip or diffusion is a rate-controlling deformation mechanism for superplasticity. Therefore the most important microstructural requirement for superplasticity is a fine grain size that is stable at high temperatures. Recently Eric et al. explored the possibility of superplasticity from coarse-grained Al-Mg alloys by utilizing a concept of solute drag creep. The purpose of this paper is three-fold: (a) studying creep behavior of Al-Mg alloys as a function of Mg content increasing up to 11 wt%; (b) investigating the effects of Mg concentration to superplastic ductility of al-Mg alloys; (c) studying tensile ductility behavior of Al-Mg alloys at very high strain rates up to 10{sup {minus}1} s{sup {minus}1} and very high temperature up to 565 C.
- OSTI ID:
- 554038
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 9 Vol. 37; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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