Effect of Deformation Temperature on Microstructure and Mechanical Properties of AZ31 Mg Alloy Processed by Differential-Speed Rolling

Title
Effect of Deformation Temperature on Microstructure and Mechanical Properties of AZ31 Mg Alloy Processed by Differential-Speed Rolling
Author(s)
고영건모삽알카심정봉권양해웅코티바하마드
Keywords
MAGNESIUM ALLOY; TENSILE PROPERTIES; TEXTURE; ECAP; SUPERPLASTICITY; EXTRUSION; EVOLUTION; SHEETS
Issue Date
201505
Publisher
JOURNAL MATER SCI TECHNOL
Citation
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, v.31, no.5, pp.498 - 503
Abstract
A differential-speed rolling (DSR) was applied to AZ31 magnesium alloy sample at different rolling temperatures of 473, 523, 573, and 623 K with 1-pass and 2-pass operations. The microstructural evolution and mechanical properties of the deformed samples were investigated. The rolling temperature was found to be an important parameter affecting the microstructural development. After DSR at 473 K, the microstructure was more homogeneous than that obtained after deformation by equal-speed rolling (ESR). The fully recrystallized microstructures were generated after DSR at 573 and 623 K. As to mechanical properties, the yield strength (YS) and ultimate tensile strength (UTS) decreased monotonously with increasing rolling temperature. In contrast, the elongation of the DSR-deformed samples was improved as the rolling temperature increased. The strain hardening exponent (n) calculated by Hollomon equation increased with increasing the rolling temperature, which would explain an increase in the uniform elongation. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/32554http://dx.doi.org/10.1016/j.jmst.2014.08.016
ISSN
1005-0302
Appears in Collections:
공과대학 > 신소재공학부 > Articles
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