Surface Characteristics Enhancement of Biocompatible Mg Alloy AZ31B by Cryogenic Milling

Abstract

The mechanical, physical and chemical properties of Magnesium alloys have undoubtedly proven compatible and efficient for their aid in biomedical sector. Magnesium tends to corrode rapidly in in-vivo environment limiting its efficiency and life expectancy as a biomedical implant. This has led to the study and research of the properties of these excellent materials in order to increase its corrosion resistivity property. In the recent years through thorough research and study it has been proven that cryogenic machining is an efficient technique for surface integrity improvements which plays a vital role in the increment of corrosion resistivity of a material. This work in particular is one of the studies in which the milling operation is carried out on a CNC milling machine on the commercially available AZ31B Magnesium alloy by a cemented carbide tool under two different milling environments namely wet and cryogenic. Different machining factors were opted and comparative investigation was conducted between the two machining conditions. The post machined results were further compared for minimum surface roughness. The comparative analysis presented a better surface finish in case of cryogenic milling than wet milling.