| 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 Author | Zhang, H. B.(zhanghb@imr.ac.cn) ; Liu, Y. J.(yujing.liu@uwa.edu.au) |
| 2020-01-13 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| ISSN | 0921-5093 |
| Volume | 771Pages:10 |
| Abstract | Selective 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. |
| Keyword | Selective laser melting Ti-Ni Scanning speed Microstructure Mechanical property |
| Funding Organization | Strategic 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 |
| DOI | 10.1016/j.msea.2019.138586 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Strategic 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 Area | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000503324700019 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136489 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, H. B.; Liu, Y. J. |
| Affiliation | 1.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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