Abstract
Metal matrix composites (MMCs) show a unique improvement in metal materials properties such as high specific strength enabling their use in various applications. Additive manufacturing (AM) allows production of complex or customized parts directly from the design without the need for expensive tooling or forms such metal molds and reduces the need for traditional MMCs processing method. Uniform mixed powder is important for producing MMCs. Although ball mills have been used in previous studies, there are problems with the length of the mixing time and the uniformity of the powder, and it is necessary to study the mixing method. Therefore, this study investigated the production of SUS316L/Al2O3 mixed powder for L-PBF using the dry impact blending method that is a method in which material powder is dispersed in a high-speed air flow and the powder is mixed by mechanical impact force. A composite powder was produced with a mixing time of 60-900 seconds for SUS316L powder weight : Al2O3 powder weight were 1 : 0.4 as a theoretical compounding weight and 1 : 0.4 as a theoretical compounding weight of 25%. As a result, it was found that a powder suitable for L-PBF with a single peak particle size distribution was produced in performed for 300 seconds or more with a theoretical composition of 25%.
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