MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ELECTRON BEAM WELDMENT OF TITANIUM ALLOY TC17

doi:10.11900/0412.1961.2015.00602

IMR OpenIR

	MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ELECTRON BEAM WELDMENT OF TITANIUM ALLOY TC17
	Yu Bingbing 1; Chen Zhiyong 1; Zhao Zibo 1; Liu Jianrong 1; Wang Qingjiang 1; Li Jinwei 2
通讯作者	Chen Zhiyong(zhiyongchen@imr.ac.cn)
	2016-07-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	52 期号:7 页码:831-841
摘要	Most titanium alloys have been designed for aeronautical applications, where their excellent specific properties are fully employed and weldability is a classic problem with Ti and its alloys. Microstructure and mechanical properties of the electron beam weldments of TC17 alloy were investigated in this work. The results showed that there exhibited three zones across the TC17 electron beam weldment: the fusion zone (FZ), heat affected zone (HAZ) and base metal (BM). It was also observed that the as-welded FZ consisted of metastable beta columnar grains, while the HAZ consisted of acicular alpha/alpha' phase, equiaxed alpha phase and metastable beta phase. Furthermore, it was indicated that the transformation from metastable beta phase to alpha+beta phase happened when the FZ and HAZ were post-weld heat treated at 630 similar to 800 degrees C, the coarsening of alpha laths and the grain boundary alpha were also observed when the heat treatment temperature increased. The increasing of 450 degrees C. ultimate tensile strength of FZ was ascribed to the precipitation of secondary acicular alpha platelets during tensile testing in the as-welded and 800 degrees C heat treated conditions, which led to the low yield ratio of FZ. The tensile failure location of the weldments was found to occur in preference in the low tensile yield strength area, or in the low hardness area when the difference between yield strength across the weldments is very small. It was concluded that the optimal post-weld heat treatment for the TC17 alloy weldment was 630 degrees C, 2 h, A.C., at which the weldments showed good combination of tensile strength and elongation.
关键词	TC17 titanium alloy electron beam welding microstructure mechanical property
DOI	10.11900/0412.1961.2015.00602
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000385747800008
出版者	SCIENCE PRESS
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/122969
专题	中国科学院金属研究所
通讯作者	Chen Zhiyong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China
推荐引用方式 GB/T 7714	Yu Bingbing,Chen Zhiyong,Zhao Zibo,et al. MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ELECTRON BEAM WELDMENT OF TITANIUM ALLOY TC17[J]. ACTA METALLURGICA SINICA,2016,52(7):831-841.
APA	Yu Bingbing,Chen Zhiyong,Zhao Zibo,Liu Jianrong,Wang Qingjiang,&Li Jinwei.(2016).MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ELECTRON BEAM WELDMENT OF TITANIUM ALLOY TC17.ACTA METALLURGICA SINICA,52(7),831-841.
MLA	Yu Bingbing,et al."MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ELECTRON BEAM WELDMENT OF TITANIUM ALLOY TC17".ACTA METALLURGICA SINICA 52.7(2016):831-841.