Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy

IMR OpenIR

	Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy
其他题名	Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy
	Zhao Jingwei 1; Ding Hua 1; Zhao Wenjuan 1; Tian Xuefeng 1; Hou Hongliang 2; Wang Yaoqi 2
	2008
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	18 期号:3 页码:506-511
摘要	The microstructures of Ti6Al4V alloy after hydrogenation were investigated by optical microscopy(OM), X-ray diffraction(XRD) and transmission electron microscopy(TEM). The influence of hydrogenation on the hardness of alpha and beta phases was analysed by microhardness testing. The influence of hydrogenation on alloying elements diffusion was studied by electron probe microanalysis(EPMA). The microstructural observation reveals that hydride delta (FCC structure) as well as large number of dislocations precipitate in the specimens with 0.278% and 0.514% hydrogen, and a lot of twins are found in the specimen with 0.514% hydrogen, simultaneously. The result of microhardness testing shows that the hardness of alpha and beta phases increases synchronously with the increase of hydrogen and the hardness increment of beta is larger than that of alpha. According to analysis of EPMA, the diffusion ability of alloy elements Al and V increases after hydrogenation. It is considered that hydrogen solution strengthening and V element diffusion are the main factors causing the hardness of a phase increase with the increase of hydrogen, and the formation of delta hydrides, lattice defects, hydrogen solution strengthening and Al element diffusion jointly cause the hardness of beta phase increase with the increasing hydrogen.
其他摘要	The microstructures of Ti6Al4V alloy after hydrogenation were investigated by optical microscopy(OM), X-ray diffraction(XRD) and transmission electron microscopy(TEM). The influence of hydrogenation on the hardness of and β phases was analysed by microhardness testing. The influence of hydrogenation on alloying elements diffusion was studied by electron probe microanalysis(EPMA). The microstructural observation reveals that hydride δ (FCC structure) as well as large number of dislocations precipitate in the specimens with 0.278% and 0.514% hydrogen, and a lot of twins are found in the specimen with 0.514% hydrogen, simultaneously. The result of microhardness testing shows that the hardness of and β phases increases synchronously with the increase of hydrogen and the hardness increment of β is larger than that of . According to analysis of EPMA, the diffusion ability of alloy elements Al and V increases after hydrogenation. It is considered that hydrogen solution strengthening and V element diffusion are the main factors causing the hardness of phase increase with the increase of hydrogen, and the formation of δ hydrides, lattice defects, hydrogen solution strengthening and Al element diffusion jointly cause the hardness of β phase increase with the increasing hydrogen.
关键词	TI-6AL-4V ALLOY TITANIUM EMBRITTLEMENT METALS Ti6Al4V alloy hydrogenation hydride microhardness defect solution strengthening diffusion
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:3252473
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/141583
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.Beijing Aeronaut Mfg Technol Res Institute, Beijing 100024, Peoples R China
推荐引用方式 GB/T 7714	Zhao Jingwei,Ding Hua,Zhao Wenjuan,et al. Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2008,18(3):506-511.
APA	Zhao Jingwei,Ding Hua,Zhao Wenjuan,Tian Xuefeng,Hou Hongliang,&Wang Yaoqi.(2008).Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,18(3),506-511.
MLA	Zhao Jingwei,et al."Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 18.3(2008):506-511.