Effect of Pre-aging on Microstructure and Mechanical Properties of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe Alloy

被引：0
|
作者：
Du Zhaoxin [1 ]
Liu Guolong [1 ]
Cui Xiaoming [1 ]
Liu Huimin [1 ]
Cheng Jun [2 ]
机构：
[1] Inner Mongolia Univ Technol, Hohhot 010051, Peoples R China
[2] Northwest Inst Nonferrous Met Res, Xian 710016, Shaanxi, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2019年 / 48卷 / 06期
关键词：
duplex aging; high strength beta titanium alloy; omega phase; microstructure; mechanical properties; OMEGA-ASSISTED ALPHA; BETA-TITANIUM ALLOYS; ISOTHERMAL OMEGA; PHASE; TRANSFORMATIONS; PRECIPITATION; TEMPERATURE; PARTICLES;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure evolution and mechanical properties of Ti-3.5A1-5Mo-6V-3Cr-25n-0.5Fe alloy after single and duplex aging treatments were studied. The single aging temperature was 550 degrees C, while the duplex aging included pre-aging at 400 degrees C followed by re -aging at 550 degrees C. The results show that when the alloy is pre-aged at 400 degrees C, the omega phase precipitates. As the pre-aging time extends, the omega phase finally changes to the alpha phase. Duplex aging is effective to yield the a phase fine dispersion, and the pre-precipitated isothermal omega phase provides more uniform nucleation positions for precipitation of alpha phase than single aging so as to improve the alloy tensile strength and hardness greatly, but the ductility drops slightly.
引用
收藏
页码：1904 / 1908
页数：5
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