Paper Title:
Influence of Number of Passes in ECAP on Superplastic Behavior in a Magnesium Alloy
  Abstract

Tensile tests were carried out at 473 K with initial strain rate of 10-4 s-1 in samples of a ZK60 alloy (Mg-5.5% Zn-0.5% Zr) processed by different number of passes using Equal-Channel Angular Pressing (ECAP). The measured superplastic elongations ranged from ~930% to a record of ~3050%. The flow behavior was found to vary with the number of passes of ECAP. It is shown that strain-hardening due to grain growth and the evolution of the strain rate sensitivity with the strain determines the flow behavior and final elongations. The results are consistent with theories of plastic flow in tensile testing.

  Info
Periodical
Materials Science Forum (Volumes 584-586)
Edited by
Yuri Estrin and Hans Jürgen Maier
Pages
170-175
DOI
10.4028/www.scientific.net/MSF.584-586.170
Citation
R. B. Figueiredo, T. G. Langdon, "Influence of Number of Passes in ECAP on Superplastic Behavior in a Magnesium Alloy ", Materials Science Forum, Vols. 584-586, pp. 170-175, 2008
Online since
June 2008
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Price
$32.00
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