• influence of oxygen content on microstructure and mechanical properties of ti–nb–ta–zr alloy

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 465
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the influence of oxygen content on microstructure and mechanical properties of ti–22.5nb–0.7ta–2zr (at.%) alloy was investigated in this work. according to experiments, the grains were refined apparently when the oxygen content was between 1.5% and 2.0%. the ultimate tensile strength (uts) increased and elongation decreased with increasing oxygen content. but at the content of 1.0%, the elongation was nearly the same to that of the original alloy (about 16%). the elastic modulus remained comparatively low (<65 gpa) when the content was lower than 1.5%, and then increased dramatically. therefore, there existed the best oxygen content-1.0%, at which fine grains were obtained, as well as uts of 750 mpa, elongation of 16% and elastic modulus of 65 gpa. the ti–22.5nb–0.7ta–2zr–1.0o alloy maintained typical ductile fracture characteristics of beta titanium alloy, and had a little superelasticity.

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