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Exploration of Rare-Earth Element Sc to Enhance Microstructure, Mechanical Properties and Corrosion Resistance of Zr-8.8Si biomedical alloy

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Journal of Bionic Engineering 2022年第2期19卷 530-546页

作者： Yaokun Fu Liying Luo Chengxia Wei Yongzhong Zhan School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Guangxi Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials Guangxi UniversityNanning 530004China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518000China

The main mechanism of rare-earth element Sc on the microstructure and properties of Zr-8.8Si biomaterial alloy was *** novel Zr-8.8Si-xSc(x=0,5,10 and 15 at.%)alloys were prepared by electric arc smelting with Ar *** microstructural and mechanical properties as well as electrochemical corrosion and tribological behaviors in artificial saliva solution of the Zr-8.8Si-xSc alloys were systematically *** results show that the Zr-8.8Si-xSc alloys only consist of two-phase α-Zr and Zr_(3)Si,Sc dissolve in α-Zr matrix to form Zr-Sc solid *** addition of Sc is conducive to refine microstructure,and reduce micro-pores of Zr-8.8Si alloy which lead to higher Young's modulus,compressive strength and *** them,the highest value of Young's modulus is 31.5 GPa,still at a low level in biomedical *** promotion of corrosion resistance can be attributed to the addition of Sc which can accelerate the formation of passive film,slow down the appearance of pitting and reduce the accumulation of corrosion products in *** the condition of sliding wear test with artificial saliva solution,compared with Zr-8.8Si-0Sc alloy,the wear loss of samples with Sc is greatly decreased,and wear resistance is increased with increasing content of *** experimental results indicate that the combination of good mechanical properties,corrosion resistance and tribological properties of Zr-8.8Si-(5,10 and 15 at.%)Sc alloys was much better than Zr-8.8Si-0Sc *** them,the comprehensive property of Zr-8.8Si-10Sc alloy is preferable in this work.

关键词： Zr-8.8Si-xSc alloys biomedical alloy Microstructure Mechanical properties Corrosion resistance Tribological properties

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The effects of aging on microstructure and superelasticity of the cold-rolled Ti-7.5Nb-4Mo-2Sn(at%) biomedical alloy

The effects of aging on microstructure and superelasticity o...

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第十二届全国物理力学学术会议

作者： J.-G.Lin D.-C.Zhang Faculty of Material and Optical-Electronic Physics Key Laboratory of Low Di-mensional Materials and Application Technology of Ministry of EducationXiangtan University

Effects of aging temperature and time on microstructure and superelasticity of Ti- 7.5Nb-4Mo-2Sn(at%) biomedical alloys were *** ingot of the alloy was fabricted by an arc melting method using pure Ti,Nb,Mo and Sn as raw *** severe cold-rolling,the plate was quenched at 800℃for 1800 s and followed by aging at 500℃,600℃and 700℃for 300 s, and for 60,300,600 and 1800 s at 600℃,then the air was cooled to room *** ageing,α",α and ω phases were precipitated in the *** aging temperature increasing,α",α and ω phases in the alloys *** aging time prolonging,ω phases convert toαphases. The aging alloys exhibit good superelasticity with high σ andηdue to the reinforcement ofαandωphases.

关键词： aging microstructure superelasticity biomedical alloy

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Microstructure,texture evolution and mechanical properties of cold rolled Ti-32.5Nb-6.8Zr-2.7Sn biomedical beta titanium alloy

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Journal of Materials Science & Technology 2018年第5期34卷 788-792页

作者： Chunbo Lan Yu Wu Lili Guo Huijuan Chen Feng Chen jiangsu key laboratory of advanced metallic materials southeast university Nanjing 211189 China

Ti-32.5 Nb-6.8 Zr-2.7 Sn（TNZS,wt%） alloy was produced by using vacuum arc melting method,followed by solution treatment and cold rolling with the area reductions of 50% and 90%.The effects of cold rolling on the microstructure,texture evolution and mechanical properties of the experimental alloy were investigated by optical microscopy,X-ray diffraction,transmission electron microscopy and universal material testing *** results showed that the grains of the alloy were elongated along rolling direction and stress-induced α＇＇ martensite was not detected in the deformed *** plastic deformation mechanisms of the alloy were related to {112} 111 type deformation twinning and dislocation ***,the transition from γ-fiber texture to α-fiber texture took place during cold rolling and a dominant {001} 110α-fiber texture was obtained after 90% cold *** the increase of cold deformation degree,the strength increased owing to the increase of microstrain,dislocation density and grain refinement,and the elastic modulus decreased owing to the increase of dislocation density as well as an enhanced intensity of {001} 110α-fiber texture and a weakened intensity of {111} 112γ-fiber *** 90% cold rolled alloy exhibited a great potential to become a new candidate for biomedical applications,since it possesses low elastic modulus（47.1 GPa）,moderate strength（883 MPa） and high elastic admissible strain（1.87%）,which are superior than those of Ti-6 Al-4 V alloy.

关键词： Cold rolling Ti-32.5Nb-6.8Zr-2.7Sn alloy Microstructure Texture evolution Mechanical properties biomedical alloy

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Wear behavior of Ti6Al4V biomedical alloys processed by selective laser melting, hot pressing and conventional casting

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Transactions of Nonferrous Metals Society of China 2017年第4期27卷 829-838页

作者： F.BARTOLOMEU M.BUCIUMEANU E.PINTO N.ALVES F.S.SILVA O.CARVALHO G.MIRANDA Center for Micro-Electro Mechanical Systems (CMEMS-UMinho) University of Minho Azurem 4800-058 Guimaraes Portugal Cross-Border Faculty of Humanities Economics and Engineering"Dunarea de Jos" University of Galati Domneasca 47 800008 Galati Romania Centre for Rapid and Sustainable Product Development Polytechnic Institute of Leiria Rua General Norton de Matos Apartado 4133 2411-901 Leiria Portugal

The aim of this work was to study the influence of the processing route on the microstructural constituents,hardness andtribological(wear and friction)behavior of Ti6Al4V biomedical *** this sense,three different processing routes were studied:conventional casting,hot pressing and selective laser melting.A comprehensive metallurgical,mechanical and tribologicalcharacterization was performed by X-ray diffraction analysis,Vickers hardness tests and reciprocating ball-on-plate wear tests ofTi6Al4V/Al2O3sliding *** results showed a great influence of the processing route on the microstructural constituents andconsequent differences on hardness and wear *** highest hardness and wear resistance were obtained for Ti6Al4Valloy produced by selective laser melting,due to a markedly different cooling rate that leads to significantly different microstructurewhen compared to hot pressing and *** study assesses and confirms that selective laser melting is potential to producecustomized Ti6Al4V implants with improved wear performance.

关键词： biomedical alloy Ti6Al4V alloy wear behavior microstructure selective laser melting hot pressing casting

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