Alternative TitleEffects of Solution-Treatment and Aging Temperature on Microstructure and Mechanical Properties of TC6 Titanium Alloy
雷晓飞; 董利民; 张志强; 胡明; 李炎州; 杨锐
Source Publication稀有金属材料与工程
Other AbstractEffects of solution-treatment and aging temperature on microstructure and mechanical properties of TC6 titanium alloy were investigated. The results show that when specimens are solution-treated is at 800~840 °C, primary α and metastable β phases are form and they grow up with the increase of the temperature, which result in the slight increase of the strength and ductility. The metastable β phase is also retained after solution-treatment at 880 °C though its stability is weakened, while at this moment double yield phenomenon is observed, which is attributed to stress-induced α″ orthorhombic martensite in the metastable β phase. When specimens are solution-treated at 920~960 °C, primary α phase dissolves, and a large amount of fine acicular α″ orthorhombic martensite precipitate from the metastable β phase;the strength increases and the ductility decreases,. The alloy is almost composed of coarse α? hexagonal martensite after solution treatment above the β transus, which lead to the decrease in strength and the brittle fracture during tensile test. In terms of different aging temperatures for solution-treated specimens(880 °C/1.5 h/WQ), the main microstructural changes are the precipitation of secondary α phase from the metastable β phase and its growth. Compared with solution-treated specimens, the specimens aged at 300 °C exhibit higher strength and lower ductility, and it can be seen that some secondary α phase and ω phase have precipitated from the β matrix. As the aging temperature increases to 400 °C, the maximum strength as well as minimum ductility is obtained. The specimens aged at 500 °C maintain the maximum strength, while the ductility is improved due to the sufficient diffusion of alloying elements. When the specimens are aged at 550 °C, they possess the optimum balance of strength and ductility. The primary α phase gradually gathers to grow up and the lamellar secondary α phase apparently disperses in the β matrix after aging at 600~700 °C, which lead to the decrease in strength and the increase in ductility.
KeywordTC6钛合金 固溶和时效 显微组织 力学性能
Indexed ByCSCD
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Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
雷晓飞,董利民,张志强,等. 固溶和时效温度对TC6钛合金显微组织与力学性能的影响[J]. 稀有金属材料与工程,2020,49.0(003):1038-1044.
APA 雷晓飞,董利民,张志强,胡明,李炎州,&杨锐.(2020).固溶和时效温度对TC6钛合金显微组织与力学性能的影响.稀有金属材料与工程,49.0(003),1038-1044.
MLA 雷晓飞,et al."固溶和时效温度对TC6钛合金显微组织与力学性能的影响".稀有金属材料与工程 49.0.003(2020):1038-1044.
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