Effect of interlayer addition on microstructure and mechanical properties of NiTi/stainless steel joint by electron beam welding

doi:10.1016/j.jmst.2020.05.043

IMR OpenIR

	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
通讯作者	Jiang, H. C.(hcjiang@imr.ac.cn) ; Rong, L. J.(ljrong@imr.ac.cn)
	2021-01-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	61 页码:16-24
摘要	NiTi/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.
关键词	NiTi Stainless steel Electron beam welding Interlayer Mechanical property
DOI	10.1016/j.jmst.2020.05.043
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000600062800002
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：30[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/321006/158743
专题	中国科学院金属研究所
通讯作者	Jiang, H. C.; Rong, L. J.
作者单位	1.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
推荐引用方式 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.