Metal Additive Manufacturing Conference - MAMC 2023

Due to the recent boom in additive manufacturing, there has been an increased interest in, and need for, proper characterization of the powders used. One aspect of powder characterization that has often been ignored in the past is air humidity. However, with additive manufacturing, the requirements for the metal powder used have changed significantly compared to classical powder metallurgy. As a result of this change, it is now also necessary to take environmental influences into account that were previously not considered to play a major role, such as air humidity. This was shown by the study carried out, in which different Böhler AMPO powder grades were characterized in atmospheres with varying air humidity levels. In addition, water uptake by adsorption on the powder surface was also investigated by means of Karl Fischer titration.