Strength enhancement and retention in magnesium subjected to uniaxial compression using centralized partial drill holes

Abstract

Abstract The automotive industry approached light weighting vehicles using alloys and composites of aluminium and magnesium to improve fuel efficiency. They further introduced sensors to gain insight into real-time monitoring of their components. In the biomedical industry, reducing stiffness of implants, promoting cell proliferation, providing controlled drug delivery, and enabling real-time monitoring of implants has been the focus. With magnesium being a biocompatible material, research on improving the material properties of biocompatible magnesium alloys and composites is ongoing. However, tracking the efficiency of these implants in-vivo is essential and can be done using appropriate sensors. But the question of where to place them and would it affect the structural integrity of the implant needs to be answered. While previous research has explored the effect of through holes in different directions and materials, the effect of a controlled drill hole has not yet been explored. Hence, this study varies the drill depths in pure magnesium from 1 mm to 2.5 mm and drill diameter from 1 mm to 2.5 mm respectively in an 8 mm diameter cylinder to study the same. Further, an exploratory work on the effect of shape of the drill hole has also been taken up. Results convey that the sample with 1 mm drill diameter and 1.5 mm drill depth provided optimum results.