Abstract
Low melting point and material adhesion attributed by the magnesium alloy led to extreme built-up edge (BUE) and built-up layer (BUL) formations. Dry machining is favourable for machining magnesium alloy; however, this strategy inflicts excessive adhesive wear on the cutting tool. Therefore, this current work focuses on innovative cooling technique known as submerged convective cooling (SCC) for the turning of the AZ31 magnesium alloy. Prior to cutting experiment, a computational fluid dynamics (CFD) simulation was conducted to evaluate internal structure of cooling module. Based on the CFD simulation, small inlet/outlet diameter significantly contribute to reduction of tool temperature because of effective heat transfer coefficient of cooling fluid in the SCC. Experimental results revealed that SCC has effectively reduced the tool temperature by 50% and contributed to 37% improvement in surface roughness when compared to dry cutting. Finally, both BUE and BUL were observed in dry and SCC conditions, but the severity of these wear mechanisms improved or decreased remarkably under SCC conditions.
Effects of Submerged Convective Cooling In The Turning of AZ31 Magnesium Alloy For Tool Temperature And Wear Improvement
