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Enhanced superplastic deformation behavior of ultrafine-grained Ti-6Al-4V alloy

✍ Scribed by L. Saitova; I. Semenova; H.W. Höppel; R. Valiev; M. Göken

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
239 KB
Volume
39
Category
Article
ISSN
0933-5137

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✦ Synopsis

Abstract

The mechanical behavior of the Ti‐6Al‐4V ELI alloy in both conventional grain size (CG) and ultrafine‐grained (UFG) conditions under tension and compression at elevated temperatures (500–800 °C) is considered. Grain refinement by equal‐channel angular pressing (ECAP) followed by multicycle extrusion was observed to result in a considerable improvement of superplastic characteristics of Ti‐6Al‐4V ELI alloy. The alloy exhibits a superplastic deformation behavior already at 600 °C. The enhanced regime of superplasticity allows more efficient forming of parts and components. In addition, the UFG microstructure and, consequently, enhanced mechanical properties are kept after superplastic forming.

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