Effect of prestrain on the superplastic behavior of a fine grained 7475 aluminum alloy

The effect of prestraining at a fast strain rate (region III) on the subsequent superplastic behavior (region II) of a 7475 Al alloy has been studied. The results show that prestraining causes a decrease in the elongation to failure as compared to the non-prestrained (as-received) samples. This decr...

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Bibliographic Details
Published in:Journal of materials science 1996-01, Vol.31 (2), p.381-385
Main Authors: Mahidhara, R K, Mukherjee, A K
Format: Article
Language:English
Online Access:Get full text
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Summary:The effect of prestraining at a fast strain rate (region III) on the subsequent superplastic behavior (region II) of a 7475 Al alloy has been studied. The results show that prestraining causes a decrease in the elongation to failure as compared to the non-prestrained (as-received) samples. This decrease in elongation is postulated to be associated with the growth of cavities formed during prestraining and grain growth during deformation in region II. Prestraining in region III did not lead to any observable inhomogeneities in strain distribution during subsequent deformation.
ISSN:0022-2461