3D grain growth simulation and experimental verification in laser beam melting of IN718

Köpf J, Rasch M, Meyer A, Markl M, Schmidt M, Körner C (2018)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2018

Pages Range: 82–86

Conference Proceedings Title: Procedia CIRP 74 (2018)

Event location: Fürth DE

URI: https://www.sciencedirect.com/science/article/pii/S2212827118308187/pdf?md5=ea85f15a94f75d82fce787e5b0a20225πd=1-s2.0-S2212827118308187-main.pdf

DOI: 10.1016/j.procir.2018.08.034

Open Access Link: https://www.sciencedirect.com/science/article/pii/S2212827118308187/pdf?md5=ea85f15a94f75d82fce787e5b0a20225πd=1-s2.0-S2212827118308187-main.pdf

Abstract

A predictive grain structure model originally used for selective electron beam melting (SEBM) is adapted to laser beam melting (LBM). Single lines with varying welding speeds were molten in a base plate made of polycrystalline IN718. The heat input is calculated with an analytical heat source model and the resulting melt pool geometry is compared with micrographs and high-speed camera shots. A typical welding microstructure is predicted by the grain growth model and confirmed with Electron Backscatter Diffraction (EBSD) measurements. With increasing line energies, a rising fragmentation of the grains is observed. This phenomenon is explained by an analyzation of the thermal gradients at the time of solidification of the grains.

Authors with CRIS profile

Johannes Köpf Sonderforschungsbereich 814/3 Additive Fertigung Michael Rasch Sonderforschungsbereich 814/3 Additive Fertigung Andreas Meyer Zentralinstitut für Neue Materialien und Prozesstechnik Matthias Markl Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM)

Related research project(s)

Activity SEBM 3D Simulation Jan. 1, 2000 - Jan. 1, 2003

How to cite

APA:

Köpf, J., Rasch, M., Meyer, A., Markl, M., Schmidt, M., & Körner, C. (2018). 3D grain growth simulation and experimental verification in laser beam melting of IN718. In Procedia CIRP 74 (2018) (pp. 82–86). Fürth, DE.

MLA:

Köpf, Johannes, et al. "3D grain growth simulation and experimental verification in laser beam melting of IN718." Proceedings of the 10th CIRP Conference on Photonic Technologies (LANE 2018), Fürth 2018. 82–86.

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