Plenary Speakers
Carolin Koerner
Friedrich-Alexander-Universität Erlangen-Nürnberg
2018/10/25 18:35:41
Carolin Korner is
1, head of the Institute of Science and Technology for Metals (WTM) in the Materials Science Department,
2, member of the Collegial Board and head of the “E-Beam Additive Manufacturing” group of the Central Institute of Advanced Materials and Processes (ZMP) and
3, Head of the “Additive Manufacturing” group of Neue Materialien Fürth GmbH (research company of the Bavarian state).
She studied theoretical physics at the FAU. She earned her PhD with distinction at the Materials Science Department of the FAU Faculty of Engineering in 1997 with a thesis on “Theoretical Investigations on the Interaction of Ultra-short Laser Radiation with Metals” under the supervision of Prof. H.W. Bergmann. Habilitation and venia legendi in Materials Science followed at FAU in the group of Prof. R.F. Singer in 2008 for “Integral Foam Molding of Light Metals: Technology, Foam Physics and Foam Simulation” (Springer Textbook).
In 2011 she took up her current position at FAU. At present, she is advising some 25 PhD students and postdocs in the field of Additive Manufacturing, Casting Technology, Alloy Development and Process Simulation.
Abstract:
Single crystals by electron beam based additive manufacturing
Currently, additive manufacturing (AM) experiences significant attention in nearly all industrial sectors. AM is already well established in fields such as medicine or spare part production. Nevertheless, processing of high performance nickel-base superalloys and especially single crystalline alloys such as CMSX-4® is challenging due to the difficulty of intense crack formation. Selective electron beam melting (SEBM) takes place at high process temperatures (~ 1000°C) and under vacuum conditions. Current work has demonstrated processing of CMSX-4® without crack formation.
In this contribution, we show how single crystals (SX SEBM CMSX-4®) develop directly from the powder bed by using appropriate AM scanning strategies. Numerical 3D simu-lation of the grain structure helps to understand the underlying mechanisms leading to effective grain selection and eventually to the evolution of a single crystal. In addition, we discuss the mechanical properties of SX SEBM CMSX-4® prepared by SEBM in the as-built condition and after heat treatment.