Abstract
Mg-Ca1.0 is newly developed biodegradable material which do not produce any toxic elements in the body. It is widely used in bone implants supporting plate and fixation screw. 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 experimental result shows that the feed rate is the most significant factor influencing the average surface roughness value which is closer to 0.1 µm. The result of degradation rate using weight loss method shows 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. Very fine grain microstructure is observed in forged sample and Mg2Ca phase is uniformly distributed in microstructure which improves the corrosion resistance. Little change of grain structure was observed during machining due to thermo mechanical effect. During machining microhardness is changed from 66HV to 84HV due to effect of machining parameters.
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