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HIGH TEMPERATURE DEFORMATION FLOW OF A ZK60A MAGNESIUM ALLOY AFTER EXTRUSION

Title
HIGH TEMPERATURE DEFORMATION FLOW OF A ZK60A MAGNESIUM ALLOY AFTER EXTRUSION
Author
Kawasaki, Megumi
Keywords
activation energy; extrusion; flow mechanism; magnesium alloy; tensile property
Issue Date
2015-07
Publisher
POLSKA AKAD NAUK
Citation
ARCHIVES OF METALLURGY AND MATERIALS, v. 60, NO 2, Page. 1327-1330
Abstract
Flow behavior of a ZK60A magnesium alloy after continuous casting and subsequent extrusion was examined in tension at a range of strain rates of 3.0x10(-6) - 1.0x10(-2) s(-1) at temperatures of 473-623K. The results demonstrated that the alloy exhibited a maximum elongation of similar to 250% at 523K when tested at an initial strain rate of 1.0x10(-5) s(-1) and strain rate sensitivity, m, of similar to 0.3-0.4 and the activation energy of similar to 94 kJ/mol were calculated under the testing conditions. The detailed investigation suggested that the high temperature flow of the ZK60A alloy having submicrometer grains demonstrates quasi-superplastic flow behavior controlled by a dislocation viscous glide process.
URI
https://www.degruyter.com/view/j/amm.2015.60.issue-2/amm-2015-0124/amm-2015-0124.xmlhttp://hdl.handle.net/20.500.11754/26616
ISSN
1733-3490; 2300-1909
DOI
10.1515/amm-2015-0124
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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