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Read the articleAUTHORS
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Jean-Jacques BLANDIN: Engineer from the École Centrale de Lyon - Doctor of the National Polytechnic Institute of Grenoble - Research fellow at the CNRS - Grenoble National Polytechnic Institute
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Michel SUERY: Doctor of Physical Sciences - Research Director at the CNRS - Director of the Physical and Mechanical Engineering of Materials Laboratory ESA CNRS No. 5010 - Grenoble National Polytechnic Institute
INTRODUCTION
Superplasticity is a property of plastic deformation at high temperatures ( where T f is the melting temperature of the metal expressed in kelvins) of a polycrystalline material characterized by significant elongation at break that can exceed 1,000% during a tensile test. This high deformation stability is exploited for thermoforming parts that are often complex and difficult to shape using other techniques. Superplastic forming thus has many applications, particularly in aeronautics, thanks to the use of titanium and aluminum alloys.
This article will discuss the fundamental aspects of superplasticity and detail the main families of materials that can exhibit this behavior. Some considerations regarding forming processes will also be presented.
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Superplasticity
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