Improving mechanical properties of selective laser melted Co29Cr9W3Cu alloy by eliminating mesh-like random high-angle grain boundary

doi:10.1016/j.msea.2020.139895

CORC > 金属研究所 > 中国科学院金属研究所

	Improving mechanical properties of selective laser melted Co29Cr9W3Cu alloy by eliminating mesh-like random high-angle grain boundary
	Lu, Yanjin 1,4; Zhao, Wei 3; Yang, Chunguagn 5; Liu, Yujing 2; Xiang, Hongliang 3; Yang, Ke 5; Lin, Jinxin 1,4
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2020-08-19
卷号	793 页码:12
关键词	Additive manufacturing Selective laser melting Residual stress Heat treatment Biomaterials
ISSN号	0921-5093
DOI	10.1016/j.msea.2020.139895
通讯作者	Liu, Yujing(yujing.liu@uwa.edu.au) ; Yang, Ke(kyang@imr.ac.cn) ; Lin, Jinxin(franklin@fjirsm.ac.cn)
英文摘要	Selective 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.
资助项目	National Natural Science Foundation of China[51801198]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000578957200052
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140909]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Yujing; Yang, Ke; Lin, Jinxin
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Univ Western Australia, Sch Mech & Chem Engn, 35 Stirling Highway, Perth, WA 6009, Australia 3.Fuzhou Univ, Sch Mech Engn & Automat, Fuzhou 350108, Peoples R China 4.Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, 155 Yangqiao Rd West, Fuzhou 350002, Peoples R China 5.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 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.