Improvement of Cooling Effect and Dimensional Accuracy of Wire and Arc Additive Manufactured Magnesium Alloy by Active-Cooling-Based Contacting Copper Blocks

Wire and arc additive manufacturing (WAAM) employing a magnesium (Mg) alloy is superior in terms of safety, energy efficiency, deposition rate when compared with process that utilizes lasers powder materials. However, problems WAAM an Mg include poor dimensional accuracy due to low viscosity the molten alloy. In addition, since alloys cause combustion reaction water, effective cooling method, such as direct water cooling, cannot be applied. this study, solid contact-based active method copper blocks high thermal conductivity was proposed improve efficiency fabricated objects using AZ31. Moreover, renders it possible fabricate wall structure flatness AZ31 solidifies upon contact flat surface blocks. harboring internal circulation system achieved higher shortened interval time between subsequent layers. Meanwhile, discovered deflected toward blocks, not onto substrate or previous layer wire tip approached too close