Processing, Deformation, and Failure in Superplastic Aluminum Alloys: Applications of Orientation-Imaging Microscopy

The importance of grain size refinement in enabling superplasticity is reviewed, and the current understanding of grain boundary characteristics is summarized. The application of orientation-imaging microscopy (OIM) methods to the processing response and the deformation and failure modes in superpla...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2004-12, Vol.13 (6), p.710-719
Main Authors: Oh-Ishi, Keiichiro, Boydon, John, McNelley, Terry R
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
Deformation
Grain boundaries
Grain size
Microscopy
Microtexture
Superplasticity
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Summary:The importance of grain size refinement in enabling superplasticity is reviewed, and the current understanding of grain boundary characteristics is summarized. The application of orientation-imaging microscopy (OIM) methods to the processing response and the deformation and failure modes in superplastic aluminum alloys are illustrated through microtexture analysis and determination of grain boundary characteristics in selected commercial materials. Continuous and discontinuous recrystallization reactions exhibit distinct microtextures and grain boundary characteristics. The application of OIM and microtexture analysis to the evaluation of both deformation and failure mechanisms during superplastic forming is illustrated.
ISSN:1059-9495
1544-1024
DOI:10.1361/10599490421349