Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 410, Issue -, Pages 439-442Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2005.08.143
Keywords
equal-channel angular pressing; magnesium-lithium alloy; strain rate sensitivity; superplasticity
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Significant grain refinement was achieved in a cast Mg-8 mass% Li alloy through processing by equal-channel angular pressing (ECAP) using a die having an internal channel angle of 110 degrees and a pressing temperature of 473 K. Following extrusion and subsequent ECAP through two passes, the alloy exhibited excellent superplastic properties including a maximum elongation of similar to 970% at 473 K when using an initial strain rate of 1.0 X 10(-4) s(-1). The strain rate sensitivities under the optimum superplastic conditions were measured as m approximate to 0.4-0.6. The maximum elongation achieved in this investigation is very high by comparison with other Mg alloys tested in tension at similar temperatures and strain rates. (c) 2005 Elsevier B.V. All rights reserved.
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