Paper Title:
Superplastic Deformation of Ultrafine Grained Al Alloy Processed by ECAP and Post-Rolling
  Abstract

Superplastic behavior of an ultrafine grained (UFG) 5154 Al alloy processed by ECAP and cold rolling (ECAP+CR sample) was investigated and compared with that of the alloy processed by only ECAP without rolling (ECAP sample) in the strain rate range of 10-4~5×10-1 s-1 at 723 K. Processing of the ECAP+CR sample consisted of ECAP of 4 passes, which was less than that showing the optimum microstructure for high strain rate superplasticity of UFG Al alloys (i.e. 8 passes), with route Bc and subsequent cold rolling (70% thickness reduction). The superplastic elongation was remarkably enhanced by post-rolling. An analysis of the mechanical data revealed that deformation of the ECAP+CR sample was dominated by grain boundary sliding, but dislocation viscous glide was the main deformation mechanism for the ECAP sample. In addition, cavitation in the ECAP+CR sample was insignificant up to ∼300% elongation.

  Info
Periodical
Materials Science Forum (Volumes 503-504)
Edited by
Zenji Horita
Pages
119-124
DOI
10.4028/www.scientific.net/MSF.503-504.119
Citation
K. T. Park, C. S. Lee, Y. S. Kim, D. H. Shin, "Superplastic Deformation of Ultrafine Grained Al Alloy Processed by ECAP and Post-Rolling", Materials Science Forum, Vols. 503-504, pp. 119-124, 2006
Online since
January 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Chang Liang Li, Hua Ding, Yong Qing Zhao, Lian Zhou
Abstract:Superplastic forming provides a good way for Ti alloys which are usually difficult to be deformed. Ti75 alloy with a nominal composition of...
2969
Authors: Young Seok Song, M.R. Lee, Jeong Tae Kim
Abstract:Alloy 718 ingot with a diameter of 400mm was made by the vacuum melting process ; VIM followed by VAR. Compression tests were conducted on...
3124
Authors: Yoshimasa Takayama, Y. Otsuka, Toshiya Shibayanagi, Hajime Kato, Kunio Funami
Abstract:Grain refinement and high temperature deformation in two kinds of magnesium alloys subjected to friction stir processing (FSP) have been...
55
Authors: Seong Hee Lee, Sang Shik Kim, Seung Zeon Han, Cha Yong Lim
Abstract:The effects of strain rate in rolling on microstructures and mechanical properties of a nano-grained high purity copper processed by...
71
Authors: Xiao Yu Zhong, Guang Jie Huang, Fang Fang He, Qing Liu
Abstract:Uni-axial tensile plastic deformation behavior of rolled magnesium alloy AZ31B under the temperature range from room temperature(RT) to 250°C...
219