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Effect of Cu on microstructure, mechanical properties, corrosion resistance and cytotoxicity of CoCrW alloy fabricated by selective laser melting
Lu, YJ; Ren, L; Xu, XC; Yang, Y; Wu, SQ; Luo, JS; Yang, MY; Liu, LL; Zhuang, DH; Yang, K; Lin, JX; Lin, JX (reprint author), Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, 155 Yangqiao Rd West, Fuzhou, Fujian, Peoples R China.; Ren, L (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang, Liaoning, Peoples R China.
2018-05-01
Source PublicationJOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
ISSN1751-6161
Volume81Pages:130-141
AbstractIn the study, CoCrWCu alloys with differing Cu content (2, 3, 4 wt%) were prepared by selective laser melting using mixture powders consisting of CoCrW and Cu, aiming at investigating the effect of Cu on the microstructures, mechanical properties, corrosion behavior and cytotoxicity. The SEM observations indicated that the Cu content up to 3 wt% caused the Si-rich precipitates to segregate along grain boundaries and in the grains, and EBSD analysis suggested that the Cu addition decreased the recrystallization degree and increased the grain diameter and fraction of big grains. The tensile tests found that the increasing Cu content led to a decrease of mechanical properties compared with Cu-free CoCrW alloy. The electrochemical tests revealed that the addition of Cu shifted the corrosion potential toward nobler positive, but increased the corrosion current density. Also, a more protective passive film was formed when 2 wt% Cu content was added, but the higher Cu content up to 3 wt% was detrimental to the corrosion resistance. It was noted that there was no cytotoxicity for Cu-bearing CoCrW alloys to MG-63 cell and the cells could spread well on the surfaces of studied alloys. Meanwhile, the Cu-bearing CoCrW alloy exhibited an excellent antibacterial performance against E.coli when Cu content was up to 3 wt%. It is suggested that the feasible fabrication of Cu-bearing CoCrW alloy by SLM using mixed CoCrW and Cu powders is a promising candidate for use in antibacterial oral repair products. This current study also can aid in the further design of antibacterial Cu-containing CoCrW alloying powders.; In the study, CoCrWCu alloys with differing Cu content (2, 3, 4 wt%) were prepared by selective laser melting using mixture powders consisting of CoCrW and Cu, aiming at investigating the effect of Cu on the microstructures, mechanical properties, corrosion behavior and cytotoxicity. The SEM observations indicated that the Cu content up to 3 wt% caused the Si-rich precipitates to segregate along grain boundaries and in the grains, and EBSD analysis suggested that the Cu addition decreased the recrystallization degree and increased the grain diameter and fraction of big grains. The tensile tests found that the increasing Cu content led to a decrease of mechanical properties compared with Cu-free CoCrW alloy. The electrochemical tests revealed that the addition of Cu shifted the corrosion potential toward nobler positive, but increased the corrosion current density. Also, a more protective passive film was formed when 2 wt% Cu content was added, but the higher Cu content up to 3 wt% was detrimental to the corrosion resistance. It was noted that there was no cytotoxicity for Cu-bearing CoCrW alloys to MG-63 cell and the cells could spread well on the surfaces of studied alloys. Meanwhile, the Cu-bearing CoCrW alloy exhibited an excellent antibacterial performance against E.coli when Cu content was up to 3 wt%. It is suggested that the feasible fabrication of Cu-bearing CoCrW alloy by SLM using mixed CoCrW and Cu powders is a promising candidate for use in antibacterial oral repair products. This current study also can aid in the further design of antibacterial Cu-containing CoCrW alloying powders.
description.department[lu, yanjin ; yang, yang ; wu, songquan ; luo, jiasi ; lin, jinxin] chinese acad sci, fujian inst res struct matter, key lab optoelect mat chem & phys, 155 yangqiao rd west, fuzhou, fujian, peoples r china ; [lu, yanjin ; luo, jiasi ; lin, jinxin] univ chinese acad sci, beijing 100049, peoples r china ; [ren, ling ; yang, ke] chinese acad sci, inst met res, 72 wenhua rd, shenyang, liaoning, peoples r china ; [xu, xiongcheng ; liu, lingling ; zhuang, danhong] fujian med univ, key lab stomatol, 88 jiaotong rd, fuzhou, fujian, peoples r china ; [yang, mingyu] army med univ, southwest hosp, chongqing, peoples r china
KeywordStainless-steel Heat-treatment Antibacterial Activity Behavior Titanium Ti Ti-6al-4v Copper Precipitation Environment
Subject AreaEngineering, Biomedical ; Materials Science, bioMaterials
Funding OrganizationNational Key RD Plan [2016YFC1100502]; Additive Manufacturing Material and Technology of FJIRSM [CXZX-2017-P04]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79325
Collection中国科学院金属研究所
Corresponding AuthorLin, JX (reprint author), Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, 155 Yangqiao Rd West, Fuzhou, Fujian, Peoples R China.; Ren, L (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Lu, YJ,Ren, L,Xu, XC,et al. Effect of Cu on microstructure, mechanical properties, corrosion resistance and cytotoxicity of CoCrW alloy fabricated by selective laser melting[J]. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,2018,81:130-141.
APA Lu, YJ.,Ren, L.,Xu, XC.,Yang, Y.,Wu, SQ.,...&Ren, L .(2018).Effect of Cu on microstructure, mechanical properties, corrosion resistance and cytotoxicity of CoCrW alloy fabricated by selective laser melting.JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,81,130-141.
MLA Lu, YJ,et al."Effect of Cu on microstructure, mechanical properties, corrosion resistance and cytotoxicity of CoCrW alloy fabricated by selective laser melting".JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS 81(2018):130-141.
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