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Effect of interlayer addition on microstructure and mechanical properties of NiTi/stainless steel joint by electron beam welding
Niu, H.1,2; Jiang, H. C.1; Zhao, M. J.1; Rong, L. J.1
Corresponding AuthorJiang, H. C.(hcjiang@imr.ac.cn) ; Rong, L. J.(ljrong@imr.ac.cn)
2021-01-20
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume61Pages:16-24
AbstractNiTi/Stainless Steel (SS) sheets have been welded via a vacuum electron beam welding process, with three methods (offsetting electron beam to SS side without interlayer, adding Ni interlayer and adding FeNi interlayer), to promote mechanical properties of the NiTi/SS joints. The joints with different interlayers are all fractured in the weld zone near the NiTi side, which is attributed to the enrichment of intermetallic compounds including Fe2Ti and Ni3Ti. The fracture mechanisms of different joints are strongly dependent on the types of interlayers, and the joints without interlayer, adding Ni interlayer and adding FeNi interlayer exhibit cleavage fracture, intergranular fracture and mixed fracture composed of cleavage and tearing ridge, respectively. Compared with the brittle laves phase Fe2Ti, Ni3Ti phase can exhibit certain plasticity, block the crack propagation and change the direction of crack propagation. The composite structure of Ni3Ti and Fe2Ti will be formed when the FeNi alloy is taken as the interlayer, which provides the joint excellent mechanical properties, with rupture strength of 343 MPa. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordNiTi Stainless steel Electron beam welding Interlayer Mechanical property
DOI10.1016/j.jmst.2020.05.043
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000600062800002
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158743
Collection中国科学院金属研究所
Corresponding AuthorJiang, H. C.; Rong, L. J.
Affiliation1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Niu, H.,Jiang, H. C.,Zhao, M. J.,et al. Effect of interlayer addition on microstructure and mechanical properties of NiTi/stainless steel joint by electron beam welding[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,61:16-24.
APA Niu, H.,Jiang, H. C.,Zhao, M. J.,&Rong, L. J..(2021).Effect of interlayer addition on microstructure and mechanical properties of NiTi/stainless steel joint by electron beam welding.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,61,16-24.
MLA Niu, H.,et al."Effect of interlayer addition on microstructure and mechanical properties of NiTi/stainless steel joint by electron beam welding".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 61(2021):16-24.
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