Microstructure and mechanical properties of new metastable β type titanium alloy

来源期刊：中国有色金属学报(英文版)2010年第12期

论文作者：周中波 费跃 赖敏杰 寇宏超 常辉 商国强 朱知寿 李金山 周廉

文章页码：2253 - 2258

Key words：metastable β titanium; heat treatment; microstructure; mechanical property

Abstract: A new metastable β type titanium alloy called TB-13 with the combination of excellent strength and ductility was developed successfully. In order to develop a perspective on this new alloy, the influence of several commonly used heat treatments on the microstructure and properties was studied. In solution-treated and quenched samples, a low-temperature aging at 480 °C results in the precipitation of finer α phase. The precipitation of coarser α phase plate at higher aging temperature (560 °C) leads to the increase of tensile ductility but reduction of strength. During low-temperature aging at 300 °C, quite homogeneous distribution of fine isothermal ω phase particles was found. The isothermal ω phase provides nucleation sites for α phase during two-step aging process and makes α phase extremely fine and disperse uniformly in b matrix. Thus, TB-13 alloy is strengthened and its mechanical properties are improved.

基金信息：the National Basic Research Program of China