Effect of oxygen on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr alloy

Hui-ping Duan, Hong-xia Xu, Wen-huang Su, Yu-bin Ke, Zeng-qian Liu, Hong-hai Song

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    Hui-ping Duan, Hong-xia Xu, Wen-huang Su, Yu-bin Ke, Zeng-qian Liu, and Hong-hai Song, Effect of oxygen on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr alloy, Int. J. Miner. Metall. Mater., 19(2012), No. 12, pp.1128-1133. https://dx.doi.org/10.1007/s12613-012-0681-4
    Hui-ping Duan, Hong-xia Xu, Wen-huang Su, Yu-bin Ke, Zeng-qian Liu, and Hong-hai Song, Effect of oxygen on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr alloy, Int. J. Miner. Metall. Mater., 19(2012), No. 12, pp.1128-1133. https://dx.doi.org/10.1007/s12613-012-0681-4
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    Effect of oxygen on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr alloy

    • School of Materials Science and Engineering, Beihang University, Beijing 100191, China

    • Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China

      通信作者:

      Wen-huang Su E-mail: suwenhuang6688@126.com

    中文摘要

    The influence of oxygen content on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr (at%) alloy in as-cast and cold-rolled states was investigated systematically in this paper. It is found that the alloy containing oxygen element is only composed of a single β phase, while the alloy without oxygen element consisted of β and α″ phases. Although the grain size becomes larger, the elastic deformation ratio, strength, and hardness of the alloy are all increased with an increase of oxygen content. The as-cast alloy has excellent plastic deformation ability, but the cold-rolled alloy containing oxygen element exhibits brittle characteristics. A conclusion can be drawn that oxygen element can stabilize β phase, inhibit the phase transformation from β to α″, and furthermore help to increase the strength and elastic deformation ability of the alloy.

     

    Effect of oxygen on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr alloy

    Author Affilications

      • School of Materials Science and Engineering, Beihang University, Beijing 100191, China

      • Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China

    • Received: 10 February 2012; Revised: 14 April 2012; Accepted: 16 April 2012;
    The influence of oxygen content on the microstructure and mechanical properties of Ti-23Nb-0.7Ta-2Zr (at%) alloy in as-cast and cold-rolled states was investigated systematically in this paper. It is found that the alloy containing oxygen element is only composed of a single β phase, while the alloy without oxygen element consisted of β and α″ phases. Although the grain size becomes larger, the elastic deformation ratio, strength, and hardness of the alloy are all increased with an increase of oxygen content. The as-cast alloy has excellent plastic deformation ability, but the cold-rolled alloy containing oxygen element exhibits brittle characteristics. A conclusion can be drawn that oxygen element can stabilize β phase, inhibit the phase transformation from β to α″, and furthermore help to increase the strength and elastic deformation ability of the alloy.

     

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