20.500.12556/RUL-134900 Thermodynamic behavior of Fe-Mn and Fe-Mn-Ag powder mixtures during selective laser melting Additive manufacturing is a form of powder metallurgy, which means the properties of the initial metal powders (chemical composition, powder morphology and size) impact the final properties of the resulting parts. A complete characterization, including thermodynamic effects and the behavior of the metal powders at elevated temperatures, is crucial when planning the manufacturing process. The analysis of the Fe-Mn and Fe-Mn-Ag powder mixtures, made from pure elemental powders, shows a high susceptibility to sintering in the temperature interval from 700 to 1000 °C. Here, numerous changes to the manganese oxides and the αMn to βMn transformation occurred. The problems of mechanically mixed powders, when using selective laser melting, were highlighted by the low flowability, which led to a less controllable process, an uncontrolled arrangement of the powder and a large percentage of burnt manganese. All this was determined from the altered chemical compositions of the produced parts. The impact of the increased manganese content on the decreased probability of the transformation from γ-austenite to ε-martensite was confirmed. The ε-martensite in the microstructure increased the hardness of the material, but at the same time, its magnetic properties reduce the usefulness for medical applications. However, the produced parts had comparable elongations to human bone. FeMn alloys powder metallurgy differential scanning calorimetry selective laser melting ε-martensite true false true Angleški jezik Ni določen Članek v reviji 2022-02-10 14:29:18 2022-02-10 14:29:18 2022-09-14 04:10:35 0000-00-00 00:00:00 2021 0 0 11 str. iss. 2, art. 234 Vol. 11 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.1/.2 2075-4701 10.3390/met11020234 49402627 RAZ_Kraner_Jakob_2021.pdf RAZ_Kraner_Jakob_2021.pdf 1 604C5F9FA3BC64A2888A62C336264FD0 57bcea31d25e14acfeea3199bb5f019e62e852c250274ec79b88c3accd3ebf58 887ab2de-8a75-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=153639 https://www.mdpi.com/2075-4701/11/2/234 0 37d9e588-8a75-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=153638 Naravoslovnotehniška fakulteta 0 0 0