Carolin Körner

TL;DR: In this paper, the lifetime, width and depth of the pools of molten powder material are analyzed for different beam powers, scan speeds and line energies in experiments and simulations, and a thermal finite element simulation tool is used to simulate the temperature distribution in the selective electron beam melting process.

TL;DR: In this paper, a three-dimensional model for the prediction of dendritic growth for use with powder bed fusion (PBF) additive manufacturing is presented. But the model is validated by reproducing experimental grain structures of Inconel 718 test specimens manufactured by selective electron beam melting and the model represents the cutting edge of grain structure simulation in PBF and enables a reliable numerical prediction of appropriate beam parameters for arbitrary applications.

TL;DR: In this paper, a model for the calculation of the specific surface area is presented which takes surface roughness into account, and a correlation allowing for the prediction of the pressure drop of icPOCS was developed based on the Ergun equation in its basic form.

TL;DR: In this paper, a systematic approach to identify auxetic cellular materials based on eigenmode analysis is presented, where the fundamental mechanism generating auxetic behavior is identified as rotation and a variety of complex two-dimensional and three-dimensional auxetic structures based on simple unit cells can be identified.

TL;DR: In this paper, an electron beam model based on a set of semi-empirical equations available from different published literature and on theoretical considerations is proposed to analyze the attenuation of the electron beam as it passes through the sample.