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ASM Handbook

Mechanical Testing and Evaluation

Edited by
Howard Kuhn
Howard Kuhn
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Dana Medlin
Dana Medlin
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ASM International
Volume
8
ISBN electronic:
978-1-62708-176-4
Publication date:
2000
Book Chapter

Superplastic Deformation at Elevated Temperatures

By
Farghalli A. Mohamed
Farghalli A. Mohamed
University of California
,
Irvine
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Published:
2000
Page range:
412 - 424

Abstract

Studies on mechanical behavior of superplasticity at or above 50" of the melting point lead to the understanding of superplasticity as a creep phenomenon. This article provides a discussion on the four relationships that define the basic deformation characteristics associated with a creep process: the stress and strain rate, strain rate or stress and temperature, strain rate or stress and grain size, and strain contributed by boundary sliding and total strain. The article describes the deformation characteristics and mechanisms of low-stress region, intermediate-stress region, and high-stress region. It also discusses the effect of impurities on superplastic flow and concludes with information on grain growth during testing.

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Farghalli A. Mohamed, 2000. "Superplastic Deformation at Elevated Temperatures", Mechanical Testing and Evaluation, Howard Kuhn, Dana Medlin

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