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Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting
Ren, D. C.1,2; Zhang, H. B.1; Liu, Y. J.1; Li, S. J.1; Jin, W.1; Yang, R.1; Zhang, L. C.3
Corresponding AuthorZhang, H. B.(zhanghb@imr.ac.cn) ; Liu, Y. J.(yujing.liu@uwa.edu.au)
2020-01-13
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume771Pages:10
AbstractSelective Laser Melting (SLM) as one of the additive manufacturing technologies can be used to produce Ti-Ni shape memory alloys with complex shape. In this work, equiatomic Ti50Ni50 (at.%) samples were produced by SLM with different scanning speed, and near-fully dense (99.5% relative density) parts were obtained under a low input laser energy density (40 J/mm(3)) with the scanning speed of 1000 mm/s. The different scanning speeds had limited influence on the phase composition, transformation temperatures and Vickers hardness. Under low magnification, the typical molten pool morphology with inhomogenous microstructure was shown in the samples of SLM-produced Ti-Ni alloy, and self-accommodate martensite (B19') twins with a few austenite (B2), nanoscale Ti2Ni and rhombohedral (R) phases were found at higher magnification. Due to the formation of nanoscale Ti2Ni phase and inhomogenous microstructure, the SLM-produced Ti-Ni alloy exhbited lower phase transformation temperatures and larger hysteresis temperatures between the start and finish point of the phase transformation compared to the Ti-Ni powder. The formation of the R phase was contributed to the special repeat heating process and stress field formed by Ti2Ni phase and dislocations In SLM equiatomic Ti-Ni alloy. The SLM-produced Ti-Ni alloy exhibits higher compressive and tensile fracture strength but lower compressive and tensile fracture strain compared to the conventional cast samples.
KeywordSelective laser melting Ti-Ni Scanning speed Microstructure Mechanical property
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
DOI10.1016/j.msea.2019.138586
Indexed BySCI
Language英语
Funding ProjectStrategic Priority Research Program of the Chinese Academy of Sciences[XDA22010103] ; National Key Research and Development Program of China[2017YFC1104903] ; National Key Research and Development Program of China[2016YFC1102601] ; National Natural Science Foundation of China[51871220] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-JSC031-02]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000503324700019
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136490
Collection中国科学院金属研究所
Corresponding AuthorZhang, H. B.; Liu, Y. J.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
3.Edith Cowan Univ, Sch Engn, Perth, WA 6027, Australia
Recommended Citation
GB/T 7714
Ren, D. C.,Zhang, H. B.,Liu, Y. J.,et al. Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,771:10.
APA Ren, D. C..,Zhang, H. B..,Liu, Y. J..,Li, S. J..,Jin, W..,...&Zhang, L. C..(2020).Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,771,10.
MLA Ren, D. C.,et al."Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 771(2020):10.
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