کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
831302 | 908102 | 2011 | 6 صفحه PDF | دانلود رایگان |
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.
Research highlights
► It focused on the influence of oxygen on microstructures and properties of beta titanium alloys.
► Gum Metal has ‘‘superproperties” different with TNTZ alloy, except for the addition of oxygen.
► The change of superelasticity of Ti–Nb–Ta–Zr–O via the addition of oxygen was discussed in the work.
► The comprehensive mechanical properties was improved for Ti–22.5Nb–0.7Ta–2Zr–1.0O alloy.
Journal: Materials & Design - Volume 32, Issue 5, May 2011, Pages 2934–2939