Effects of Annealing Process on Microstructure and Mechanical Properties of TC6 Titanium Alloy Bars

IMR OpenIR

	Effects of Annealing Process on Microstructure and Mechanical Properties of TC6 Titanium Alloy Bars
	Lei Xiaofei; Dong Limin; Zhang Zhiqiang; Ba Hongbo; Wang Haizhong; Yang Rui
通讯作者	Dong Limin(lmdong@imr.ac.cn)
	2017-06-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	46 页码:80-84
摘要	Effects of annealing temperature, cooling mode and isothermal annealing process on microstructure and mechanical properties of TC6 titanium alloy bars were studied. The results show that when specimens are annealed at 800 similar to 840 degrees C with air cooling, equiaxed microstructure forms and strength decreases slightly with increasing the annealing temperature. Bimodal microstructure forms due to secondary alpha phase precipitate in beta matrix after annealing at 880 degrees C with air cooling, which lead to the maximum strength and little decrease in plasticity. With further increasing of annealing temperature, microstructure is coarsend obviously, so strength and plasticity decrease. Fine acicular Widmanstatten structure is obtained above the beta transus, which lead to increase in strength but significantly decrease in plasticity. When specimens are annealed at 800 similar to 1000 degrees C with furnace cooling, there are two obvious differences of microstructure evolution between air-cooled and furnace-cooled specimens. Firstly, compared with air-cooled specimens, the annealing temperature of forming bimodal microstructure is higher and secondary alpha phase does not obviously precipitate in beta matrix below the beta transus. Secondly, lamellar Widmanstatten is obtained above the beta transus. The strength of furnace-cooled specimens decreases with increasing the temperature, and the change of plasticity is not significant. In addition, the maximum value of impact toughness occurs after annealing at 880 degrees C with furnace cooling. The excellent matching of strength, plasticity and impact toughness is obtained after isothermal annealing (880 degrees C, 2 h, FC to 650 degrees C, 2 h, AC), which is similiar to that of furnace-cooled specimen annealed at 880 degrees C.
关键词	TC6 titanium alloy annealing temperature cooling mode microstructure mechanical properties
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000406570100017
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/124856
专题	中国科学院金属研究所
通讯作者	Dong Limin
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Lei Xiaofei,Dong Limin,Zhang Zhiqiang,et al. Effects of Annealing Process on Microstructure and Mechanical Properties of TC6 Titanium Alloy Bars[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46:80-84.
APA	Lei Xiaofei,Dong Limin,Zhang Zhiqiang,Ba Hongbo,Wang Haizhong,&Yang Rui.(2017).Effects of Annealing Process on Microstructure and Mechanical Properties of TC6 Titanium Alloy Bars.RARE METAL MATERIALS AND ENGINEERING,46,80-84.
MLA	Lei Xiaofei,et al."Effects of Annealing Process on Microstructure and Mechanical Properties of TC6 Titanium Alloy Bars".RARE METAL MATERIALS AND ENGINEERING 46(2017):80-84.