New insights in the development of α phase during continuously heating in a β-quenched Ti-5321 alloy. (20th March 2022)

• Record Type: Journal Article
• Authors: Wu, Cong; Zhao, Qinyang; Huang, Shixing; Zhao, Yongqing; Lei, Lei; Sun, Qiaoyan; Zhou, Lian
• Is Part Of: Journal of materials science & technology. Volume 103(2022)
• Page Start: 29
• Page End: 33
• Publication Date: 2022-03-20
• Subjects: Continuously heating -- Lattice misfit -- Development of α phase; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.06.026
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: Acicular α, striated α and string-like α were found at different temperatures. Striated α formed at 570 °C showed highly strained lattice inside with unique satellite reflections. String-like α formed at 690 °C result from the impingement of individual α phase. Abstract: An in-depth understanding of the development of α phase have been proposed in a β-quenched Ti-5Al-3Mo-3V-2Cr-2Zr-1Nb-1Fe alloy during continuously heating process. Acicular α, striated α and string-like α were displayed at different temperatures. The acicular α formed at 390 °C gathered together in parallel to form clusters, which originated from the assisted nucleation of ω clusters. The striated α formed at 570 °C showed highly strained lattice inside with unique satellite reflections, referring to the displacive-diffusion formation mechanism of α phase. The string-like α formed at 690 °C was the result of the impingement of individual α phase. These results provided new insights into the phase transformation mechanism in the near β titanium alloys.