Paper Title:
Developing High Strain Rate Superplasticity in Aluminum Alloys
  Abstract

The conventional materials used in superplastic forming operations generally have grain sizes of ~2 µm or larger and they exhibit superplasticity at relatively low strain rates. Processing by equal-channel angular pressing (ECAP) produces materials having ultrafine-grain sizes, usually in the submicrometer range. If these ultrafine grains show reasonable stability at elevated temperatures, the alloys may exhibit a capability for achieving superplastic elongations at high strain rates. This paper examines the development of ultrafine-grained structures and superplastic ductilities in a spray-cast aluminum 7034 alloys through ECAP. The results show that ECAP is a very effective procedure for achieving grain refinement and superplasticity at rapid strain rates.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
2949-2954
DOI
10.4028/www.scientific.net/MSF.475-479.2949
Citation
C. Xu, M. Furukawa, Z. Horita, T. G. Langdon, "Developing High Strain Rate Superplasticity in Aluminum Alloys", Materials Science Forum, Vols. 475-479, pp. 2949-2954, 2005
Online since
January 2005
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$32.00
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