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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Molybdenum Content on Structure and Properties of a Co-Cr Biomedical Alloy
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Effect of Molybdenum Content on Structure and Properties of a Co-Cr Biomedical Alloy

机译：钼含量对CO-CR生物医学合金结构与性能的影响

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摘要

The present study aimed to develop several Co-Cr biomedical alloys with different amounts of molybdenum. The weight percentages of molybdenum were in the range of 0-4 wt.% in the base alloy (Co-30Cr). The microstructures, phases, density, mechanical strength, wear behavior and corrosion characteristics of these alloys were evaluated. The results showed that density, hardness and compressive strength increased by increase in Mo content in the alloy. In contrast, corrosion rate decreased when the Mo weight percentage was increased. Furthermore, addition of Mo up to 3 wt.% caused the volumetric wear loss to increase. However, 4 wt.% Mo in the alloy led to a reduction in the volumetric wear loss, even lower than that of Co-30Cr alloy without molybdenum. The variations of friction coefficient, however, were different under different operating conditions. Since no single alloy could merely satisfy all the desired characteristics, the entropy-analytic hierarchy process (AHP)-gray relational analysis (GRA) technique was utilized to select the best alloy among the examined materials. From the ranking order gained, it was indicated that M-4 (having 4 wt.% Mo) biomedical alloy possesses the best combination of all the properties.
机译：本研究旨在开发几种具有不同量的钼的CO-CR生物医学合金。钼的重量百分比在碱基合金（CO-30CR）中的0-4重量％。评估了这些合金的微观结构，阶段，密度，机械强度，磨损行为和腐蚀特性。结果表明，密度，硬度和抗压强度增加了合金中的Mo含量的增加。相反，当MO重量百分比增加时，腐蚀速率降低。此外，添加多达3重量％的Mo。％导致体积磨损损失增加。然而，4重量％。合金中的％Mo导致体积磨损损失的减少，甚至低于没有钼的CO-30CR合金的减少。然而，在不同的操作条件下摩擦系数的变化是不同的。由于没有单个合金可以仅满足所有所需的特征，因此利用熵分析层次处理（AHP）-Gray关系分析（GRA）技术在检查材料中选择最佳合金。从获得的排名顺序中，表明M-4（具有4重量％的Mo）生物医学合金具有所有性质的最佳组合。

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