Knowledge Management System Of Institute of metal research，CAS
| Microstructure and properties of equiatomic Ti-Ni alloy fabricated by selective laser melting | |
| Ren, D. C.; Zhang, H. B.; Liu, Y. J.; Li, S. J.; Jin, W.; Yang, R.; Zhang, L. C. | |
| 2020-01-13 | |
| Source Publication | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| Volume | 771 |
| 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. |
| DOI | 10.1016/j.msea.2019.138586 |
| WOS ID | WOS:000503324700019 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/83234 |
| Collection | 中国科学院金属研究所 |
| 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. |
| 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. |
| 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). |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment