Viewpoint: metallurgical aspects of powder bed metal additive manufacturing

摘要: Metal additive manufacturing has emerged as a new option for aerospace and biomedical applications. The many challenges that surround this technology fall into several different categories. paper addresses one of these categories, the physical mechanisms control process. Physical effects processing parameters on microstructures properties additively manufactured parts. Some might not have been recognized, yet, those are currently known, detailed quantitative predictions to be established. metal firmly grounded in metallurgy, branching laser physics granular materials. Powder bed is described from powder storage post-processing elements metallurgy highlighted relevant aspects These include surface reactions particles, heating melting behavior bed, solidification, post-processing. This overview metallurgical intended help guide research efforts it will also serve snapshot current understanding manufacturing.