中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 30 No. 9 September 2020 |
（1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. College of Biology, Hunan University, Changsha 410082, China;
3. Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf 40237, Germany）
Abstract:Ti-Zr alloys (oxygen content 0.42-0.54 wt.%) were prepared via powder metallurgy and hot working. The results indicate that the Ti-Zr alloys exhibit Zr-rich and Zr-lean areas with the same α-phase structure, and the Zr-rich area shows a slightly higher oxygen content and a much finer grain size. The Ti-Zr alloys present a good combination of high strength (σs=700-900 MPa) and total elongation (>20%), and solid solution strengthening of oxygen plays a major role. Zr does not influence much the oxygen-induced brittleness due to its high structural similarity to Ti. Therefore, the high value of 0.54 wt.% is still within the critical oxygen content for the ductile-to-brittle transition of Ti and does not degrade the ductility.
Key words: oxygen; Ti-Zr alloys; ductility; powder metallurgy
