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Service properties of ultrafine-grained Ti–6Al–4V alloy at elevated temperature

  • Nanostructured Materials
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Abstract

This study deals with investigation of mechanical properties and fatigue behavior of the ultra-fine grained (UFG) alloy Ti–6Al–4V at elevated temperatures. UFG samples were produced by means of combination of equal-channel angular pressing and thermomechanical treatments. Studies of the temperature dependence of mechanical properties of the UFG alloy demonstrated their thermal stability upto 175–350 °C. It was revealed that 100-hour creep rupture strength at 300 °C increased from 750 MPa in the conventional state to 890 MPa in the UFG state. The alloy demonstrates stability of the UFG structure at 300 and 370 °C in the conditions of long-term tests. The fatigue tests were conducted with axial loading applied on a sample at 175 °C, the asymmetry factor of the cycle was 0.1. The fatigue endurance limit of the UFG alloy was almost 50 % higher than that of the CG alloy.

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Acknowledgements

The study has been conducted under the support of Federal Target Program within the state contract No 14.740.11.0134.

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Authors and Affiliations

  1. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia

    I. P. Semenova, G. I. Raab & R. R. Valiev

  2. Central Institute of Aviation Motor Development named P. I. Baranov, Moscow, Russia

    E. R. Golubovskiy

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  1. I. P. Semenova
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  2. G. I. Raab
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  3. E. R. Golubovskiy
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  4. R. R. Valiev
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Correspondence to I. P. Semenova.

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Semenova, I.P., Raab, G.I., Golubovskiy, E.R. et al. Service properties of ultrafine-grained Ti–6Al–4V alloy at elevated temperature. J Mater Sci 48, 4806–4812 (2013). https://doi.org/10.1007/s10853-013-7305-x

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  • DOI: https://doi.org/10.1007/s10853-013-7305-x

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