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Improving mechanical properties of selective laser melted Co29Cr9W3Cu alloy by eliminating mesh-like random high-angle grain boundary
Lu, Yanjin1,2; Zhao, Wei5; Yang, Chunguagn3; Liu, Yujing4; Xiang, Hongliang5; Yang, Ke3; Lin, Jinxin1,2
Corresponding AuthorLiu, Yujing(yujing.liu@uwa.edu.au) ; Yang, Ke(kyang@imr.ac.cn) ; Lin, Jinxin(franklin@fjirsm.ac.cn)
2020-08-19
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume793Pages:12
AbstractSelective laser melting (SLM) has been attracting increasing attention as a suitable route for fabricating personalized orthopedic implants to address patient-prosthesis mismatches and has been used for producing Co29Cr9W3Cu alloys in our previous study. However, SLM technology can result in the formation of mesh-like random high-angle grain boundaries (indicated as molten pool boundaries) and accumulation of residual stress in the microstructure, possibly causing an unstable mechanical property. In this study, the research on the relationship between microstructural evolution and mechanical properties was performed on the SLM-produced Co29Cr9W3Cu alloys with different heat treatments to improve the reliable mechanical property of the SLM-produced Co29Cr9W3Cu orthopedic implants. It was found that the microstrucutre with mesh-like random high-angle grain boundaries could be eliminated during recrystallization, replaced by the one with equiaxial structure containing the Sigma 3 grain boundaries (annealing twin). Most importantly, the combined effect of eliminating the mesh-like random high-angle grain boundaries and residual stress and generating the Sigma 3 grain boundary contributed to an increase in elongation from 12.49% of the as-SLM-produced one to 23.38%. Proper heat treatment is considered to be an efficient strategy to improve the mechanical properties of the SLM-produced Co29Cr9W3Cu alloy with a desired tensile ductility.
KeywordAdditive manufacturing Selective laser melting Residual stress Heat treatment Biomaterials
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.msea.2020.139895
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51801198]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000578957200052
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/140910
Collection中国科学院金属研究所
Corresponding AuthorLiu, Yujing; Yang, Ke; Lin, Jinxin
Affiliation1.Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, 155 Yangqiao Rd West, Fuzhou 350002, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
4.Univ Western Australia, Sch Mech & Chem Engn, 35 Stirling Highway, Perth, WA 6009, Australia
5.Fuzhou Univ, Sch Mech Engn & Automat, Fuzhou 350108, Peoples R China
Recommended Citation
GB/T 7714
Lu, Yanjin,Zhao, Wei,Yang, Chunguagn,et al. Improving mechanical properties of selective laser melted Co29Cr9W3Cu alloy by eliminating mesh-like random high-angle grain boundary[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,793:12.
APA Lu, Yanjin.,Zhao, Wei.,Yang, Chunguagn.,Liu, Yujing.,Xiang, Hongliang.,...&Lin, Jinxin.(2020).Improving mechanical properties of selective laser melted Co29Cr9W3Cu alloy by eliminating mesh-like random high-angle grain boundary.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,793,12.
MLA Lu, Yanjin,et al."Improving mechanical properties of selective laser melted Co29Cr9W3Cu alloy by eliminating mesh-like random high-angle grain boundary".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 793(2020):12.
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