Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion

Title
Enhancement of strain-rate sensitivity and shear yield strength of a magnesium alloy processed by high-pressure torsion
Authors
장재일
Keywords
Grain boundary sliding; High-pressure torsion; Magnesium alloy; Strain-rate sensitivity; Yielding
Issue Date
2015-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SCRIPTA MATERIALIA, v. 94, Page. 44-47
Abstract
A Mg-Zn-Zr alloy was processed by high-pressure torsion for up to 2 turns at room temperature to produce significant grain refinement together with enhanced plasticity and strength. Measurements were performed to determine the strain-rate sensitivity, shear yield strength and activation volume as a function of the processing conditions. The results suggest there is a significant contribution from grain boundary sliding to the flow process and the onset of plasticity is associated with heterogeneous dislocation nucleation. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11754/21687http://www.sciencedirect.com/science/article/pii/S135964621400373X
ISSN
1359-6462
DOI
http://dx.doi.org/10.1016/j.scriptamat.2014.09.014
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE & ENGINEERING(신소재공학부) > Articles
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