Abstract
AbstractMagnesium alloys are highly preferred for use in the automobile sector and aerospace industry because of their low density and superior strength. Due to the lightweight and high strength of magnesium alloys, they are continuously being used for engineering applications. The transport industry has benefitted a lot as weight reduction is of prime importance in terms of cost saving. AM60 magnesium alloy also has good resistance to corrosion especially when compared with the rusting of mild steel in the same atmosphere. The paper makes an attempt to determine the best machining conditions to manufacture magnesium goods, especially AM60 magnesium alloy. Drilling operation is carried out on AM60 magnesium alloy, and the results obtained are optimized using ANOVA technique. The output responses analysed are residual stress, thermal stress, surface roughness, maximum amplitude of vibration, deviation from concentricity, deviation from cylindricity, deviation from diameter and deviation from perpendicularity. These responses are analysed using ANOVA in order to check the productivity of drilling operation at controlled input parameters such as cutting speed, feed, time and drill bit treatment. Cryogenically treated drill bits with different tempering cycles are used as one of the input parameters. The input parameters are pre-defined and then applied in the drilling operation, and the corresponding results obtained are analysed.KeywordsANOVAAM60Cryogenic treated drill toolsHole quality
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