Effect of Heat Treatment Process on Microstructure of a New Metastable β Titanium Alloy

Abstract:

The effects of solution temperature and aging temperature on microstructure of a new metastable β titanium alloy were studied. With the decrease of solution temperature, β grain size gradually decreased. When the solution temperature dropped to 780°C, the average grain size was about 10 μm. As the aging temperature increased from 500 °C to 560 °C, the secondary α phase increased. The nucleation of the secondary α phase within the grain was uniform, and its relationship with the β matrix was satisfied with Burgers. With the extension of aging time, the amount of the secondary α phases increased obviously, and they had a staggered arrangement with each other, presenting the phenomenon of the tensile strength increasing continuously. The strength level reached to 1500 MPa after aging at 500 °C for 8 h.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 223-229
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.223
• Online since: May 2020
• Authors: Xin Nan Wang*, Yun Peng Xin, Ming Bing Li, Zhi Shou Zhu, Guo Qun Zhao
• Keywords: Heat Treatment, Metastable β-Phase Titanium Alloy, Microstructure, Precipitated Phase

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