Journal of Materials Engineering and Performance

, Volume 21, Issue 2, pp 253–256 | Cite as

Flow Stress-Strain Rate Behavior of Ti-3Al-2.5V Alloy at Low Temperatures in the Superplastic Range

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Abstract

Flow stress-strain rate behavior of Ti-3Al-2.5V, an α + β titanium alloy was studied at 750 and 800 °C by using the method of crosshead speed cycling. The alloy was found to exhibit superplasticity at these temperatures on the basis of complete flow stress, strain rate and strain rate sensitivity data. Strain-induced softening was observed in the alloy to a small extent at 750 °C and was thought to be related to the grain refinement occurring in both α- and β-phases during the initial stages of deformation. However, at 800 °C the effect was seen only under increasing strain-rate conditions. Flow stress versus strain rate curves generally exhibited only region II which corresponded to low- and intermediate-strain rates and region III corresponding to high-strain rates.

Keywords

strain softening/hardening superplasticity titanium alloy 
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Notes

Acknowledgments

The author wishes to thank Dr. C. Hammond, under whose supervision the work was carried out at Institute for Materials Research, University of Leeds, UK.

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Copyright information

© ASM International 2011

Authors and Affiliations

  1. 1.Faculty of Engineering and TechnologyUniversity of the PunjabLahorePakistan

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