Drilling of AZ31 Magnesium Alloy under Dry and Cryogenic Conditions

It is extremely important to machining the materials without harming the environment and with high efficiency. In this study, the machinability of AZ31 magnesium alloy in dry and cryogenic conditions was investigated experimentally. Experimental variables; cooling conditions, cutting speed, feed rate, and cutting length were selected. In the drilling tests conducted at in dipped cryogenic approach, no burrs were formed at the hole exit and a clean surface was obtained. On the bore-hole surface roughness evaluation, smoother surfaces were obtained in the drilling tests performed under the cryogenic approach. In the bore-hole surface hardness comparison, lower hardness values were measured with the use of cryogenic bath conditions