Microstructure and mechanical properties of new metastable β type titanium alloy

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 12; pp. 2253 - 2258
• Main Author: 周中波 费跃 赖敏杰 寇宏超 常辉 商国强 朱知寿 李金山 周廉
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2010; State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China%Beijing Institute of Aeronautical Materials, Beijing 100095, China
• Subjects: Alloy development; Ductility; heat treatment; Mechanical properties; mechanical property; metastable β titanium; Microstructure; Phase plates; Precipitation; Strength; Titanium base alloys; 亚显微结构; 力学性能; 强度降低; 摄氏度; 时效温度; 淬火处理; 组织和性能; 钛合金; mechanical property; microstructure; heat treatment; metastable β titanium
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(10)60637-1

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 finerαphase.The precipitation of coarserαphase 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 isothermalωphase particles was found.The isothermalωphase provides nucleation sites forαphase during two-step aging process and makesαphase extremely fine and disperse uniformly in β matrix.Thus,TB-13 alloy is strengthened and its mechanical properties are improved.