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Ni-loss compensation and thermomechanical property recovery of 3D printed NiTi alloys by pre-coating Ni on NiTi powder
Ye, D.1,2; Li, S. F.1,2,3; Misra, R. D. K.4; Zheng, R.1,2; Yang, Y. F.1,2,3
2021-11-01
Source PublicationADDITIVE MANUFACTURING
ISSN2214-8604
Volume47Pages:10
AbstractThe approach of pre-coating Ni on NiTi powder was adopted as an effective route to address the thermomechanical property degradation of NiTi alloy caused by Ni-loss during the printing process of laser powder bed fusion. The electroless plating process of Ni on NiTi powder was initiated with the removal of the outermost TiO2 layer by alkaline solution and the exposure of Ni catalytic nucleation site. The newly exposed Ni was an active catalyst for coating Ni and eventually triggered the deposition of Ni on NiTi powder via self-catalytic reaction. The intrinsic homogeneity of Ni, as a major alloying element in NiTi powder, ensured high uniformity of Ni-coating on the surface of the powder and good sphericity, necessary for good printability. Furthermore, Nicoating increased laser absorbability, and a higher content of Ni compared to the theoretical value was thereby required to compensate for the Ni-loss. Simultaneously, densification was enhanced even at lower laser energy density on using Ni-coated powder. During the printing process, ultrafine Ni-coating was rapidly homogenized such that the thermomechanical property was completely recovered. As a consequence, it is underscored that Ni-loss can be addressed by compensating Ni on the original powder prior to the printing process, providing a new pathway toward printing of high-performance shape memory alloys.
KeywordLaser powder bed fusion Electroless plating NiTi shape memory alloy Ni-loss Composite powder
DOI10.1016/j.addma.2021.102344
Language英语
WOS KeywordSHAPE-MEMORY ALLOYS ; TITANIUM ; PERFORMANCE
Funding ProjectNational Key Research and Development Program of China[2018YFB1105100] ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[YJKYYQ20190011] ; Shandong Provincial Science and Technology Innovation Project[2019JZZY010363]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Manufacturing ; Materials Science, Multidisciplinary
Funding OrganizationNational Key Research and Development Program of China ; Scientific Instrument Developing Project of the Chinese Academy of Sciences ; Shandong Provincial Science and Technology Innovation Project
WOS IDWOS:000707759900004
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/50655
Collection中国科学院过程工程研究所
Corresponding AuthorYang, Y. F.
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Nanjing IPE Inst Green Mfg Ind, Nanjing 211135, Peoples R China
4.Univ Texas El Paso, Dept Met Mat & Biomed Engn, 500W Univ Ave, El Paso, TX 79968 USA
Recommended Citation
GB/T 7714
Ye, D.,Li, S. F.,Misra, R. D. K.,et al. Ni-loss compensation and thermomechanical property recovery of 3D printed NiTi alloys by pre-coating Ni on NiTi powder[J]. ADDITIVE MANUFACTURING,2021,47:10.
APA Ye, D.,Li, S. F.,Misra, R. D. K.,Zheng, R.,&Yang, Y. F..(2021).Ni-loss compensation and thermomechanical property recovery of 3D printed NiTi alloys by pre-coating Ni on NiTi powder.ADDITIVE MANUFACTURING,47,10.
MLA Ye, D.,et al."Ni-loss compensation and thermomechanical property recovery of 3D printed NiTi alloys by pre-coating Ni on NiTi powder".ADDITIVE MANUFACTURING 47(2021):10.
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