Research for Thermal Stability of Ti-6.5A1-3.5Mo-0. 2Si
The analysis of the microstructures and mechanical properties at room temperature about Ti-6. 5A1-3. 5Mo-0. 2Si titanium alloy bar, hot exposed blanks and hot exposed specimen is in this paper. Thermal stabilitys changing regularity and influences of the alloy were studied. Tensile test result at room temperature showed that alloys tensile and yield strength increased 25MPa respectively;and percentage of blanks elongtation droppedslightly,percentage of specimens elongtation fell 1. 5％ when they were exposed after keeping 1000 hours at 500℃; percentage reduction of alloys area fell 4. 5％,and materials thermal stability dropped a little. When material had been hot exposed,primary α phase and the secondary α phase slice that was formed among |3 phase change microstructure (βPCM) .didnt precipitate α2 phase;primary α phase grew bigger and formed convex by the trifurcate grain boundary; the secondary α phase slice grew slightly, β phase lessened and the inner microstructures changed, these main reasons brought about thermal stability dropping;after hot exposing there was oxide surface, the thickness was about 0. 2 μm and diffusion layers thickness was about 1. 0μm,the oxygen effective area was 1. 2μm,these factors effect on thermal stability was less.
Ti-6. 5Al-3. 5Mo-0. 2Si titanium alloy thermal stability hot exposing
TAO Hailin LI Geping ZHANG Peng CHEN Zhanqian WEI Shouyong
Baoji Titanium Industry Co. ,Ltd,Shaanxi,Baoji 721014 ,China Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016 , China Northwest Institute for Nonferrous Metal Research ,Xian 710016,Chin
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1345-1348
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）