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Influence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy
Alternative TitleInfluence of hydrogenation on microstructures and microhardness of Ti6Al4V alloy
Zhao Jingwei1; Ding Hua1; Zhao Wenjuan1; Tian Xuefeng1; Hou Hongliang2; Wang Yaoqi2
2008
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume18Issue:3Pages:506-511
AbstractThe 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.
Other AbstractThe 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.
KeywordTI-6AL-4V ALLOY TITANIUM EMBRITTLEMENT METALS Ti6Al4V alloy hydrogenation hydride microhardness defect solution strengthening diffusion
Indexed ByCSCD
Language英语
CSCD IDCSCD:3252473
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141583
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.Beijing Aeronaut Mfg Technol Res Institute, Beijing 100024, Peoples R China
Recommended Citation
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.
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