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The role of microstructure on corrosion fatigue behavior of thick-plate Ti-6Al-4V joint via vacuum electron beam welding
Zeng, C. Y.1; Zhang, Y. P.1; Hu, J. L.1; Hou, B.1; Wang, H. Y.1; Dong, Ch L.1; Zhou, Y.2
Corresponding AuthorZhang, Y. P.(zhangyp@gwi.gd.cn) ; Dong, Ch L.(dongchl@gwi.gd.cn)
2020-12-01
Source PublicationVACUUM
ISSN0042-207X
Volume182Pages:16
AbstractThe microstructure and corrosion fatigue behavior under artificial seawater environment of 100-mm-thick Ti-6Al-4V alloy joint via vacuum electron beam welding (EBW) was systematically characterized. Obvious microstructural heterogeneity along the transverse direction of as-welded joint was observed. Bimodal-phases microstructure of granular alpha colonies and beta strips compose the microstructure of the base metal (BM). While the microstructure of fusion zone (FZ) comprises single-phase acicular alpha/alpha' martensite. Under corrosive environment of artificial seawater, FZ shows a lower growth rate of corrosion fatigue cracking (CFC) than that in the BM. Increasing content of residual gas contamination worsens the resistance against corrosion fatigue of the FZ of Ti-6Al-4V alloy joint. Results of local electrochemical characterization indicates that the FZ shows a better resistance against electrochemical corrosion than that of the BM. It is deduced that the slower growth rate of CFC observed in the FZ originates from the combined effects of the excellent corrosion resistance of martensite microstructure and the obstructions of interfaces of fine alpha/alpha' laths against growth of CFC. Moreover, the growth mechanisms of CFC in the BM and FZ were discussed involving the microstructural heterogeneity of the EBW joint.
KeywordTitanium alloy Electron beam welding Corrosion fatigue behavior Microstructure Crack growth
Funding OrganizationNational Foundation of China ; Foundation of Guangdong Province ; GDAS's Project of Constructing Domestic First-class Research Institutions ; Project of Panzhihua steel group co. LTD
DOI10.1016/j.vacuum.2020.109714
Indexed BySCI
Language英语
Funding ProjectNational Foundation of China[51405092] ; Foundation of Guangdong Province[2016B070701025] ; Foundation of Guangdong Province[2017A070701026] ; Foundation of Guangdong Province[2018B090904004] ; GDAS's Project of Constructing Domestic First-class Research Institutions[2020GDASYL-20200103122] ; GDAS's Project of Constructing Domestic First-class Research Institutions[2019GDASYL-0103075] ; GDAS's Project of Constructing Domestic First-class Research Institutions[No2018GDASCX-0113] ; Project of Panzhihua steel group co. LTD[2014-03] ; Project of Panzhihua steel group co. LTD[2015-10]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000582757100037
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141165
Collection中国科学院金属研究所
Corresponding AuthorZhang, Y. P.; Dong, Ch L.
Affiliation1.Guangdong Acad Sci, Guangdong Welding Inst, Guangdong Prov Key Lab Adv Welding Technol, Guangzhou 510651, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zeng, C. Y.,Zhang, Y. P.,Hu, J. L.,et al. The role of microstructure on corrosion fatigue behavior of thick-plate Ti-6Al-4V joint via vacuum electron beam welding[J]. VACUUM,2020,182:16.
APA Zeng, C. Y..,Zhang, Y. P..,Hu, J. L..,Hou, B..,Wang, H. Y..,...&Zhou, Y..(2020).The role of microstructure on corrosion fatigue behavior of thick-plate Ti-6Al-4V joint via vacuum electron beam welding.VACUUM,182,16.
MLA Zeng, C. Y.,et al."The role of microstructure on corrosion fatigue behavior of thick-plate Ti-6Al-4V joint via vacuum electron beam welding".VACUUM 182(2020):16.
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