Influence of Manufacturing Parameters on Performance of Biodegradable Mg-Ca1.0 Implant

Abstract

Abstract:The paper reports the effects of machining parameters on performance of biodegradable magnesium calcium alloy implant in terms of surface roughness, microstructure, microhardness, chip morphology and degradation rate in face milling using CVD diamond like carbon coated carbide inserts. The result shows that the corrosion resistance of forged sample is higher than that of cast sample. It is also found that the surface roughness is the most significant factors affecting degradation rate. Degradation is mainly occured due to pitting corrosion phenomena. A fine grain microstructure is observed in forged sample and Mg 2 Ca phase is uniformly distributed in microstructure which improves the corrosion resistance. During machining microhardness is changed from 66Hv to 84Hv due to effect of machining parameters. As far as the chip morphology is concerned the depth of cut has significant influence on helical distance of chip.

Characteristics and Surface Serviceability for Cryogenic Milling Mg-1.6Ca-2.0Zn Medical Magnesium Alloy

“…Yan [ 25 ] et al compared experiments with magnesium alloy with cold air under pressure or dry cutting, and found that the former milling improved the surface quality and prevented magnesium alloy from burning easily during dry cutting. Desai [ 26 ] et al studied the influence of processing parameters on the properties of medical magnesium alloys. The results show that increasing cutting speed can improve the corrosion resistance and effectively alleviate pitting corrosion.…”