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Low Temperature Strain Rate Sensitivity of Titanium Alloys

Abstract : Titanium alloys are widely used in many industrial applications such as in aeronautics due to their combination of good mechanical properties, excellent corrosion resistance and low density. The mechanical behaviour of titanium alloys is known to exhibit a peculiar dependence on both deformation temperature and strain rate. Titanium alloys show significant room temperature creep and they are very sensitive to dwell fatigue and sustained load cracking. This behaviour is related to the viscosity of plastic deformation in titanium alloys, which can be represented by a strain rate sensitivity (SRS) parameter. The present study aims to compare the tensile behavior of two different titanium alloys, Ti-6Al-4V and β21S, which exhibit dissimilar microstructures. Results of tensile tests, performed under constant strain rate and including strain rate changes, are reported in terms of flow stress, ductility and SRS over a wide range of temperatures.
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Héloïse Vigié, Thalita De Paula, Martin Surand, Bernard Viguier. Low Temperature Strain Rate Sensitivity of Titanium Alloys. Solid State Phenomena, Trans Tech Publications Ltd 2016, 258, pp.570-573. ⟨10.4028/⟩. ⟨hal-02392091⟩



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