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Strong and Ductile Ti-6Al-4V Alloy Produced by Hot Pressing of Ti-6Al-4V Swarf

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Abstract

Ti-6Al-4V (Ti-64) swarf is produced every day in commercial operations but its direct use for the fabrication of strong and ductile Ti-6Al-4V alloy is seldom reported. This study consolidated as-received Ti-64 swarf into near fully dense Ti-6Al-4V alloy by hot pressing. The microstructures and tensile mechanical properties of the hot-pressed Ti-64 alloy and the effect of subsequent solution treatment and ageing (STA) were studied. The hot-pressed Ti-64 achieved tensile yield strength (TYS) of 928–998 MPa, ultimate tensile strength (UTS) of 1076–1139 MPa and strain to fracture of 6.92–7.80%. The STA increased the TYS to 1103–1143 MPa and UTS to 1188–1223 MPa, accompanied by a decline in the strain to fracture to 5.32–6.48%. These tensile property data suggest that it is possible to directly consolidate Ti-6Al-4V swarf into a strong and ductile Ti-6Al-4V alloy by hot pressing for a variety of potential applications.

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Acknowledgements

The authors from the University of Waikato gratefully acknowledge the funding support from the Strategic Investment Fund of the University of Waikato, New Zealand (Grant No. 2018-SIF-106309), and Ministry of Business, Innovation and Employment (MBIE), New Zealand (Contract no. UOWX1402) and the Australian team thanks the Australian Defence Science and Technology Group (DSTG) for funding this research.

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Authors and Affiliations

  1. Waikato Centre for Advanced Materials, School of Engineering, University of Waikato, Hamilton, 3240, New Zealand

    F. Yang, Z. Q. Pi, Q. Y. Zhao, S. Raynova & L. Bolzoni

  2. Defence Science and Technology Organisation, 506 Lorimer Street, Fishermans Bend, VIC, 3207, Australia

    Q. Liu & K. Sharp

  3. Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia

    M. Brandt & M. Qian

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  1. F. Yang
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  2. Z. Q. Pi
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  3. Q. Y. Zhao
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  4. S. Raynova
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  5. Q. Liu
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  6. K. Sharp
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  7. M. Brandt
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  8. L. Bolzoni
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  9. M. Qian
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Correspondence to F. Yang.

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Yang, F., Pi, Z.Q., Zhao, Q.Y. et al. Strong and Ductile Ti-6Al-4V Alloy Produced by Hot Pressing of Ti-6Al-4V Swarf. JOM 71, 1056–1061 (2019). https://doi.org/10.1007/s11837-018-3301-6

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  • DOI: https://doi.org/10.1007/s11837-018-3301-6

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