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Influence of Fine-Scale Alpha Precipitation on the Mechanical Properties of the Beta Titanium Alloy Beta-21S

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Abstract

Mechanical response of β-21S alloy microstructures with fine-scale and coarser alpha phase was compared via microstructural and mechanical characterization. Results indicate that work-hardening behavior of β-21S is a strong function of alpha size scale. Specimens with fine-scale alpha exhibited substantially higher strengths (~1200 MPa) compared to those containing coarser alpha precipitates (~950 MPa). Furthermore, reasonable tensile elongation values, ~8 pct, to failure could be achieved for these high strengths, provided grain boundary fracture can be limited.

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This work was conducted partially within the NSF I/UCRC Center for Advanced Non-Ferrous Structural Alloys (CANFSA), which is a joint industry-university center between the Colorado School of Mines and the University of North Texas. RB would also like to acknowledge partial funding from NSF Grant #1309277. The authors would also like to acknowledge Prof R.S. Mishra for allowing us to utilize facilities available in his laboratory.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76207, USA

    S. A. Mantri (Graduate Student), D. Choudhuri (Post-Doctoral Research Assistant), A. Behera (Graduate Student), N. Kumar (Post-Doctoral Research Assistant) & R. Banerjee (Professor)

  2. Center for Advanced Research and Technology, University of North Texas, Denton, TX, 76207, USA

    S. A. Mantri (Graduate Student), D. Choudhuri (Post-Doctoral Research Assistant) & R. Banerjee (Professor)

  3. Center for Advanced Non-Ferrous Structural Alloys, University of North Texas, Denton, TX, 76207, USA

    S. A. Mantri (Graduate Student), D. Choudhuri (Post-Doctoral Research Assistant), J. D. Cotton (Technical Fellow) & R. Banerjee (Professor)

  4. Metallic Materials, Boeing Research & Technology, Seattle, WA, 98124, USA

    J. D. Cotton (Technical Fellow)

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  1. S. A. Mantri
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  2. D. Choudhuri
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  3. A. Behera
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  4. J. D. Cotton
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  5. N. Kumar
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  6. R. Banerjee
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Correspondence to R. Banerjee.

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Manuscript submitted December 1, 2014.

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Mantri, S.A., Choudhuri, D., Behera, A. et al. Influence of Fine-Scale Alpha Precipitation on the Mechanical Properties of the Beta Titanium Alloy Beta-21S. Metall Mater Trans A 46, 2803–2808 (2015). https://doi.org/10.1007/s11661-015-2944-y

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  • DOI: https://doi.org/10.1007/s11661-015-2944-y

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