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The Development of Superplasticity and Deformation Mechanism Maps in an Ultrafine-Grained Magnesium Alloy

Title
The Development of Superplasticity and Deformation Mechanism Maps in an Ultrafine-Grained Magnesium Alloy
Author
Kawasaki, Megumi
Keywords
Deformation mechanism maps; Grain boundary sliding; Magnesium alloys; Superplasticity
Issue Date
2016-11
Publisher
Trans Tech Publications
Citation
Materials Science Forum, v. 879, Page. 48-53
Abstract
Magnesium alloys with refined grain structure are often superplastic at elevated temperatures with maximum elongations up to more than 1000%. The superplastic behavior of this material agrees with deformation by grain boundary sliding. Dislocation climb becomes the rate controlling mechanism at higher stresses but the rate controlling mechanism at lower stresses is not fully documented. This report examines the development of superplasticity in a magnesium ZK60 alloy and shows that an increase in stress exponent and decrease in elongation takes place at low stresses. Deformation mechanism maps are constructed considering Regions I, II and III and Coble creep. © 2017 Trans Tech Publications, Switzerland.
URI
https://www.scientific.net/MSF.879.48https://repository.hanyang.ac.kr/handle/20.500.11754/101056
ISBN
978-303571129-5
ISSN
02555476
DOI
10.4028/www.scientific.net/MSF.879.48
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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