Enhanced superplasticity and diffusional creep in ultrafine-grained Mg-6Al-1Zn alloy with high thermal stability

Kim, W. J.; Park, I. B.

doi:10.1016/j.scriptamat.2012.10.011

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Enhanced superplasticity and diffusional creep in ultrafine-grained Mg-6Al-1Zn alloy with high thermal stability

Kim, W. J.;
Park, I. B.

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33

초록

Ultrafine-grained Mg-6Al-1Zn alloys, which have beta-Mg17Al12 70-140 nm particles preferentially located at the grain boundaries, exhibited excellent thermal stability and superplasticity at high temperatures. Diffusional creep (Coble creep), which has rarely been reported in other ultrafine-grained Mg alloys and composites, becomes dominant over the grain boundary sliding mechanism at strain rates near 10(-4) s(-1) 523-573 K. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

키워드

Severe plastic deformation; Magnesium alloys; Superplasticity; Grain refining; Ultrafine-grained microstructure; MAGNESIUM ALLOY; DEFORMATION MECHANISM; ECAP; MICROSTRUCTURE; TEMPERATURES; EXTRUSION; EVOLUTION

제목: Enhanced superplasticity and diffusional creep in ultrafine-grained Mg-6Al-1Zn alloy with high thermal stability

저자: Kim, W. J.; Park, I. B.

DOI: 10.1016/j.scriptamat.2012.10.011

발행일: 2013-02

유형: Article

저널명: Scripta Materialia

권: 68

호: 3-4

페이지: 179 ~ 182