20.500.12556/DiRROS-18028 Relevance of inter-particle interaction in directed energy deposition powder stream Blown powder dynamics is one of the aspects of Directed Energy Deposition (DED) with a major influence on deposition quality and potential for improvement in simulation. Most currently employed computational models discard powder grain collisions as negligible, although little explicit evidence for that claim exists. A Discrete Element Method approach is thus employed in the present work to simulate the actual number of grain collisions in a powder stream of a commercial discrete coaxial nozzle and how that number varies with the key processing parameters. While the number of powder grain collisions is found to in fact be negligible at one side of the usable parameter spectrum, the opposite side results in as many as 84% of all the powder grains being involved in inter-granular collisions with an average rebound angle of 14◦, challenging the established hypothesis of the negligibility of this phenomena. DED powder stream grain collisions DEM LDN tok prahu trkanje zrn MDE true false true Elsevier Nizozemska Angleški jezik Ni določen © 2024 The Authors. Published by Elsevier B.V. Neznano 2024-01-31 08:38:42 2024-01-31 08:38:42 2024-03-14 11:34:01 0000-00-00 00:00:00 2024 0 0 str. 1-9 Vol. 435 Feb. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.762 0032-5910 10.1016/j.powtec.2024.119393 181362947 https://www.sciencedirect.com/science/article/pii/S0032591024000354?via%3Dihub 1 c2b5723d-c00b-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24468 RAZ_Mede_Tijan_2024.pdf RAZ_Mede_Tijan_2024.pdf 1 08E688B8C8E9C89F180DBF0D19AA9733 79a6564edc08cf36975c4428beaff83352e5a60380eab46f007285b13494d492 1f239c66-c3f6-11ee-8001-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24578 Inštitut za kovinske materiale in tehnologije 0 0 0