Microstructural Features and Mechanical Properties of the Ti-6Al-4V ELI Alloy Processed by Severe Plastic Deformation

Abstract:

This paper investigates microstructures and mechanical properties of the TI-6AL-4V ELI alloy processed by ECAP and extrusion with various morphology of α and β-phase. Preliminary thermal treatment consisted of quenching and further high-temperature ageing. The present work reveals that the decrease of volume fraction of α-phase globular component in the initial billet results in a more homogeneous structure refinement during SPD, lower internal stress, enhancement of microstructure stability and mechanical properties. An ultimate strength of UTS ≥1350 MPa was obtained in the Ti-6Al-4V ELI alloy while maintaining a ductility of δ≥11%.

• Periodical: Materials Science Forum (Volumes 503-504)
• Pages: 757-762
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.503-504.757
• Online since: January 2006
• Authors: Irina P. Semenova, Lilia R. Saitova, Georgy I. Raab, Alexander Korshunov, Yuntian T. Zhu, Terry C. Lowe, Ruslan Valiev
• Keywords: Equal-Channel Angular Pressing (ECAP), Mechanical Property, Ti-6Al-4V ELI Alloy, Ultrafine Grained Structure

References

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