The ω phase transformation during the low temperature aging and low rate heating process of metastable β titanium alloys

Bin Tang, Yudong Chu, Mengqi Zhang, Caisi Meng, Jiangkun Fan, Hongchao Kou, Jinshan Li

科研成果: 期刊稿件文章同行评审

28 引用 (Scopus)

摘要

The ω phase transformation during isothermal aging and continuous heating process for three metastable β titanium alloys, Ti-5Al-5Mo-5V-3Cr (Ti-5553), Ti-5Al-5Mo-5V-3Cr-1Zr (Ti-55531) and Ti-7Mo-3Cr-3Nb-3Al (Ti-7333) were studied by dilatometry and transmission electron microscopy (TEM) methods. Results show that the ω phase transformation window of Ti-5553 and Ti-55531 alloys is about 275 °C–350 °C, while that of Ti-7333 alloy is 200 °C–375 °C. The ω particles produced during ageing process is larger than that produced during continuous heating process. A new developed Mo equivalent formula was used to discuss the effect of chemical composition on ω phase transformation for metastable β titanium alloys. It was found that metastable β titanium alloys with lower Mo equivalent have lower starting temperature of ω phase transformation and wider transformation window.

源语言英语
文章编号122125
期刊Materials Chemistry and Physics
239
DOI
出版状态已出版 - 1 1月 2020

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