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Effect of Post-Rolling after ECAP on Superplastic Behavior of Commercial Al-Mg Alloy

Title
Effect of Post-Rolling after ECAP on Superplastic Behavior of Commercial Al-Mg Alloy
Author
신동혁
Keywords
high superplasticity; equal channel angular pressing; rolling; deformation mechanisms; rare earths
Issue Date
2004-08
Publisher
稀土学报(英文版)
Citation
JOURNAL OF RARE EARTHS, v. 22, No. z2, Page. 53-56
Abstract
A commercial Al-Mg alloy was subjected to equal channel angular pressing of 4 passes with and without postrolling, and the effects of post-rolling on the deformation characteristics of the alloy at 723 K were examined. Post-rolling was found to influence the deformation behavior significantly. The deformation behavior of the alloy processed only by equal channel angular pressing was characterized by (a) localized deformation indicated by severe surface prominence and depression, (b) the strain rate sensitivity of 0.33, and (c) moderate high strain rate superplastic elongations. By contrast, that of the alloy processed by equal channel angular pressing and post-rolling (70 % thickness reduction) was manifested by (a) uniform deformation associated with grain boundary sliding throughout the sample, (b) a sigmoidal behavior showing the strain rate sensitivity of 0.45 at the intermediate strain rates in the logarithmic stress-strain rate curve, and (c) very large high strain rate superplastic elongations.
URI
https://information.hanyang.ac.kr/#/eds/detail?an=edscoj.zgxtxb.e2004z2015&dbId=edscojhttps://repository.hanyang.ac.kr/handle/20.500.11754/151672
ISSN
1002-0721
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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