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TiZrNbTaMo high-entropy alloy designed for orthopedic implants: As-cast microstructure and mechanical properties
Wang, Shao-Ping; Xu, Jian; Xu, J (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2017-04-01
Source PublicationMATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
ISSN0928-4931
Volume73Pages:80-89
AbstractCombining the high-entropy alloy (HEA) concept with property requirement for orthopedic implants, we designed a Ti(20)Zr(20)Nb(20)Ta(20)Mo(20)equiatomic HEA. The arc-melted microstructures, compressive properties and potentiodynamic polarization behavior in phosphate buffer solution (PBS) were studied in detail. It was revealed that the as-cast TiZrNbTaMo HEA consisted of dual phases with bcc structure, major bcc1 and minor bcc2 phases with the lattice parameters of 03310 nm and 03379 nm, respectively. As confirmed by nanoindentation tests, the bcc1 phase is somewhat harder and stiffer than the bcc2 phase. The TiZrNbTaMo HEA exhibited Young's modulus of 153 GPa, Vickers microhardness of 4.9 GPa, compressive yield strength of sigma(y)= 1390 MPa and apparent plastic strain of epsilon(p) approximate to 6% prior to failure. Moreover, the TiZrNbTaMo HEA manifested excellent corrosion resistance in PBS, comparable to the Ti6Al4V alloy, and pitting resistance remarkably superior to the 316L SS and CoCrMo alloys. These preliminary advantages of the TiZrNbTaMo HEA over the current orthopedic implant metals in mechanical properties and corrosion resistance offer an opportunity to explore new orthopedic-implant alloys based on the TiZrNbTaMo concentrated composition. (C) 2016 Elsevier B.V. All rights reserved.; Combining the high-entropy alloy (HEA) concept with property requirement for orthopedic implants, we designed a Ti(20)Zr(20)Nb(20)Ta(20)Mo(20)equiatomic HEA. The arc-melted microstructures, compressive properties and potentiodynamic polarization behavior in phosphate buffer solution (PBS) were studied in detail. It was revealed that the as-cast TiZrNbTaMo HEA consisted of dual phases with bcc structure, major bcc1 and minor bcc2 phases with the lattice parameters of 03310 nm and 03379 nm, respectively. As confirmed by nanoindentation tests, the bcc1 phase is somewhat harder and stiffer than the bcc2 phase. The TiZrNbTaMo HEA exhibited Young's modulus of 153 GPa, Vickers microhardness of 4.9 GPa, compressive yield strength of sigma(y)= 1390 MPa and apparent plastic strain of epsilon(p) approximate to 6% prior to failure. Moreover, the TiZrNbTaMo HEA manifested excellent corrosion resistance in PBS, comparable to the Ti6Al4V alloy, and pitting resistance remarkably superior to the 316L SS and CoCrMo alloys. These preliminary advantages of the TiZrNbTaMo HEA over the current orthopedic implant metals in mechanical properties and corrosion resistance offer an opportunity to explore new orthopedic-implant alloys based on the TiZrNbTaMo concentrated composition. (C) 2016 Elsevier B.V. All rights reserved.
description.department[wang, shao-ping ; xu, jian] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
KeywordHigh-entropy Alloy Mechanical Property Orthopedic Implants Solid Solution Refractory Metal
Subject AreaMaterials Science, bioMaterials
Funding OrganizationNational Natural Science Foundation of China [51571192]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78215
Collection中国科学院金属研究所
Corresponding AuthorXu, J (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Wang, Shao-Ping,Xu, Jian,Xu, J . TiZrNbTaMo high-entropy alloy designed for orthopedic implants: As-cast microstructure and mechanical properties[J]. MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS,2017,73:80-89.
APA Wang, Shao-Ping,Xu, Jian,&Xu, J .(2017).TiZrNbTaMo high-entropy alloy designed for orthopedic implants: As-cast microstructure and mechanical properties.MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS,73,80-89.
MLA Wang, Shao-Ping,et al."TiZrNbTaMo high-entropy alloy designed for orthopedic implants: As-cast microstructure and mechanical properties".MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS 73(2017):80-89.
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