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Materials 2011, 4(7), 1194-1223; doi:10.3390/ma4061194
Review

Micrograin Superplasticity: Characteristics and Utilization

Received: 16 May 2011; in revised form: 7 June 2011 / Accepted: 16 June 2011 / Published: 1 July 2011
(This article belongs to the Special Issue Superplasticity and Superplastic Forming)
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Abstract: Micrograin Superplasticity refers to the ability of fine-grained materials (1 µm < d < 10 μm, where d is the grain size) to exhibit extensive neck-free elongations during deformation at elevated temperatures. Over the past three decades, good progress has been made in rationalizing this phenomenon. The present paper provides a brief review on this progress in several areas that have been related to: (a) the mechanical characteristics of micrograin superplasticity and their origin; (b) the effect of impurity content and type on deformation behavior, boundary sliding, and cavitation during superplastic deformation; (c) the formation of cavity stringers; (d) dislocation activities and role during superplastic flow; and (e) the utilization of superplasticity.
Keywords: cavitation; cryomilling; dislocation activity; ductility, grain boundary sliding; high-strain rate superplasticity; impurity effect; micrograin superplasticity; nanocrystalline materials cavitation; cryomilling; dislocation activity; ductility, grain boundary sliding; high-strain rate superplasticity; impurity effect; micrograin superplasticity; nanocrystalline materials
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Mohamed, F.A. Micrograin Superplasticity: Characteristics and Utilization. Materials 2011, 4, 1194-1223.

AMA Style

Mohamed FA. Micrograin Superplasticity: Characteristics and Utilization. Materials. 2011; 4(7):1194-1223.

Chicago/Turabian Style

Mohamed, Farghalli A. 2011. "Micrograin Superplasticity: Characteristics and Utilization." Materials 4, no. 7: 1194-1223.


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