Kawasaki, Megumi
2017-04-06T00:10:16Z
2017-04-06T00:10:16Z
2015-07
ARCHIVES OF METALLURGY AND MATERIALS, v. 60, NO 2, Page. 1327-1330
1733-3490
2300-1909
https://www.degruyter.com/view/j/amm.2015.60.issue-2/amm-2015-0124/amm-2015-0124.xml
http://hdl.handle.net/20.500.11754/26616
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.
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (MSIP) of Korean government (Grant No. 2012R1A1A1012983).
en
POLSKA AKAD NAUK
activation energy
extrusion
flow mechanism
magnesium alloy
tensile property
HIGH TEMPERATURE DEFORMATION FLOW OF A ZK60A MAGNESIUM ALLOY AFTER EXTRUSION
Article
2
60
10.1515/amm-2015-0124
1327-1330
ARCHIVES OF METALLURGY AND MATERIALS
Kawasaki, M.
Lee, H-J.
Oh, M.C.
Ahn, B.
2015010929
S
COLLEGE OF ENGINEERING[S]
DIVISION OF MATERIALS SCIENCE AND ENGINEERING
megumi
A-1872-2010
http://orcid.org/0000-0003-0028-3007