Microstructure, mechanical properties and dry wear resistance of |-type Ti-15Mo-xNb alloys for biomedical applications

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• 作者：Li-juan XU^a ; ^{xljuan@hit.edu.cn} ; Shu-long XIAO^a ; ^b ; Jing TIAN^a ; Yu-yong CHEN^a ; ^b
• 关键词：¦Â-type Ti-Mo-Nb alloys ; wear resistance ; adhesive wear ; microstructure ; mechanical properties
• 刊名：Transactions of Nonferrous Metals Society of China
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：23
• 期：3
• 页码：692-698
• 全文大小：4167 K

文摘

In order to study the effect of element Nb on the microstructure and properties of the biomedical |-type Ti-Mo based alloys, Ti-15Mo-xNb (x=5, 10, 15 and 20 in % ) alloys were investigated. The dry wear resistance of |-type Ti-15Mo-xNb alloys against Gr15 ball was investigated on CJS111A ball-disk wear instrument. Experimental results indicate that crystal structure and morphology of the Ti-15Mo-xNb alloys are sensitive to their Nb contents. Ti-15Mo-xNb alloys match those for | phase peaks and no any phases are found. The Vickers hardness values of all the Ti-15Mo-xNb alloys are higher than HV200. The compression yield strength of the Ti-15Mo-5Nb alloy is the lowest and that of the Ti-15Mo-10Nb alloy is the highest. For all the Ti-15Mo-xNb alloys, the friction coefficient is not constant but takes a higher value. In dry condition, SEM study reveals deep parallel scars on the wear surfaces of all the Ti-15Mo-xNb alloys under different loads. The friction coefficient of the Ti-15Mo-5Nb alloy under 1 N is the lowest. The wear principal mechanism for Ti-15Mo-xNb alloys is adhesive wear.