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Open AccessReview

Recent Development of Superplasticity in Aluminum Alloys: A Review

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State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
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College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
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Light Alloys Research Institute, Central South University, Changsha 410083, China
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Laboratory of Mechanics of Gradient Nanomaterials, Nosov Magnitogorsk State Technical University, Magnitogorsk 455000, Russia
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PDPM Indian Institute of Information Technology, Design and Manufacturing, Jabalpur 482005, India
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Electron Microscope Unit, University of New South Wales, Sydney, NSW 2052, Australia
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Author to whom correspondence should be addressed.
Metals 2020, 10(1), 77; https://doi.org/10.3390/met10010077
Received: 10 December 2019 / Revised: 28 December 2019 / Accepted: 30 December 2019 / Published: 2 January 2020
Aluminum alloys can be used in the fabrication of intricate geometry and curved parts for a wide range of uses in aerospace and automotive sectors, where high stiffness and low weight are necessitated. This paper outlines a review of various research investigations on the superplastic behavior of aluminum alloys that have taken place mainly over the past two decades. The influencing factors on aluminum alloys superplasticity, such as initial grain size, deformation temperature, strain rate, microstructure refinement techniques, and addition of trace elements in aluminum alloys, are analyzed here. Since grain boundary sliding is one of the dominant features of aluminum alloys superplasticity, its deformation mechanism and the corresponding value of activation energy are included as a part of discussion. Dislocation motion, diffusion in grains, and near-grain boundary regions being major features of superplasticity, are discussed as important issues. Moreover, the paper also discusses the corresponding values of grain size exponent, stress exponent, solute drag creep and power law creep. Constitutive equations, which are essential for commercial applications and play a vital role in predicting and analyzing the superplastic behavior, are also reviewed here. View Full-Text
Keywords: aluminum alloys; superplasticity; ultrafine-grained materials; severe plastic deformation; grain boundary sliding aluminum alloys; superplasticity; ultrafine-grained materials; severe plastic deformation; grain boundary sliding
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MDPI and ACS Style

Bhatta, L.; Pesin, A.; Zhilyaev, A.P.; Tandon, P.; Kong, C.; Yu, H. Recent Development of Superplasticity in Aluminum Alloys: A Review. Metals 2020, 10, 77.

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