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.

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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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