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Microstructure and properties of burn-resistant Ti-Al-Cu alloys

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Abstract

Ti-Al-Cu series burn-resistant alloys are newly developed materials which have low density, low cost and are easy to process. The results show that Ti-Al-Cu alloys have good burn resistance due to their good thermal conductivity, low melting point, and the existence of Ti2Cu phase which also has a very low melting point. Ti-Al-Cu alloys have excellent thermal processability and good room and high temperature tensile properties, but an increase in copper content harms their thermal stability. After thermal exposure for a long time, Ti2Cu phase will coalesce and coarsen, but the addition of Si and Al will be useful for their thermal stability. The Ti-13Cu-1Al-0.2Si alloy has good thermal stability at 540°C and good creep resistance at 300°C and 100 MPa. The phases of Ti-Al-Cu alloys were found to be composed of α phase and Ti2Cu. The character of the Ti2Cu phase changes with the increasing copper content.

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Authors and Affiliations

  1. Northwest Institute for Non-ferrous Metal Research, P.O.Box 51, Xi'an, Shaanxi, People's Republic of China, 710016

    K. Y. Zhu, Y. Q. Zhao, H. L. Qu, Z. L. Wu & X. M. Zhao

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  1. K. Y. Zhu
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  2. Y. Q. Zhao
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  3. H. L. Qu
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  4. Z. L. Wu
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  5. X. M. Zhao
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Zhu, K.Y., Zhao, Y.Q., Qu, H.L. et al. Microstructure and properties of burn-resistant Ti-Al-Cu alloys. Journal of Materials Science 35, 5609–5612 (2000). https://doi.org/10.1023/A:1004873501005

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