Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 378, Issue 1-2, Pages 253-257Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2003.10.062
Keywords
metals; grain boundaries; acoustic properties; strain
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Low-temperature superplasticity (LTSP) and internal friction in microcrystalline ZK60 and AZ91 magnesium alloys processed by equal-channel angular pressing (ECAP) are reported. Excellent low-temperature superplasticity (<300degreesC) was observed in ECAP-processed materials: elongations to failure are 810 and 570% in ZK60 and AZ91 alloys, respectively, at a strain rate of 3 x 10(-3) S-1. Internal friction can be practically used to determine the optimum temperature for superplasticity. (C) 2004 Elsevier B.V. All rights reserved.
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