Ultrafine-grained (0.6 mu m) Al-Mg-Sc alloy with predominant high-angle boundaries was produced by friction stir processing. A superplastic elongation of 210% was obtained at 175 degrees C, and the optimum strain rate and maximum elongation increased with increasing temperature. Marker lines were scratched on the polished specimen surfaces using a nano-indenter to measure grain boundary sliding (GBS) offsets during deformation, which indicated that the GBS contribution to the strain exceeded 50% at 175 degrees C and increased with increases in strain and temperature. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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[liu, f. c.; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;ma, zy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zyma@imr.ac.cn
F. C. Liu,Z. Y. Ma. Contribution of grain boundary sliding in low-temperature superplasticity of ultrafine-grained aluminum alloys[J]. Scripta Materialia,2010,62(3):125-128.
APA
F. C. Liu,&Z. Y. Ma.(2010).Contribution of grain boundary sliding in low-temperature superplasticity of ultrafine-grained aluminum alloys.Scripta Materialia,62(3),125-128.
MLA
F. C. Liu,et al."Contribution of grain boundary sliding in low-temperature superplasticity of ultrafine-grained aluminum alloys".Scripta Materialia 62.3(2010):125-128.
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