Effect of Cu on microstructure, mechanical properties, corrosion resistance and cytotoxicity of CoCrW alloy fabricated by selective laser melting

IMR OpenIR

	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
发表期刊	JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
ISSN	1751-6161
卷号	81 页码:130-141
摘要	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.; 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.
部门归属	[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
关键词	Stainless-steel Heat-treatment Antibacterial Activity Behavior Titanium Ti Ti-6al-4v Copper Precipitation Environment
学科领域	Engineering, Biomedical ; Materials Science, bioMaterials
资助者	National Key RD Plan [2016YFC1100502]; Additive Manufacturing Material and Technology of FJIRSM [CXZX-2017-P04]
收录类别	SCI
语种	英语
WOS记录号	WOS:000430772200014
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79325
专题	中国科学院金属研究所
通讯作者	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.
推荐引用方式 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.