Authors:
Frederik Tischel (1), Vasily Ploshikhin (1)
1- University of Bremen, Airbus Endowed Chair for Integrative Simulation and Engineering of Materials and Processes, Germany
Abstract:
Sinter-based Additive Manufacturing (SBAM) methods, such as Metal Binder Jetting, bridge the high productivity rate of series production and freedom of design in additive manufacturing. However, SBAM requires a subsequent sintering process to achieve the desired material properties, resulting in distortion due to anisotropic shrinkage and creep distortion. Numerical simulation can be used to predict and compensate for this distortion. The numerical approach requires the determination of sintering strain and viscosity. These material parameters depend on many factors such as density, grain size, and temperature. Therefore, many experiments are necessary to specify all dependen-cies.
In this study sintering strain and viscosity are determined as process-related, time-dependent mate-rial parameters directly from sinter dilatometer experiments of binder-jetted Ti-6Al-4V samples under different loads. The process-related material parameters vastly reduce the experimental effort. Fur-ther, the calculated sinter distortion is more accurate than the results using material parameters determined by complex material models.
DOI:
https://doi.org/10.59499/EP246278578
