Eutectic solidification in Al-Ni for L-PBF conditions: A phase-field simulation study

Apel M, Boussinot G, Döring M, Schmidt M (2020)

Publication Type: Conference contribution

Publication year: 2020

Journal

Procedia CIRP Curran

Publisher: Elsevier B.V.

Book Volume: 94

Pages Range: 64-68

Conference Proceedings Title: Procedia CIRP

Event location: Virtual, Online

DOI: 10.1016/j.procir.2020.09.013

Abstract

Two-phase solidification microstructures of regular binary eutectic alloys are composed of lamellar or rod-like pattern. The corresponding characteristic length scale λ is the spacing between lamellae or rods and results from an interplay between lateral diffusion and capillary, i.e. interfacial curvature. The basic theory had been developed by Jackson and Hunt (JH) in the 1960's and has been proven successfully for “slow” solidification. It leads to a scaling relation v.λ2=const. with v the growth velocity. In this work, we investigated eutectic solidification in Al-Ni for the faster growth rates in L-PBF processing by means of phase-field simulations. The consequences of the fast solidification on the deviation from the JH-scaling and the appearance of new features in the growth pattern are shown. Simulation results are confronted with microstructures seen in L-PBF build samples. Eventually, we discuss the opportunity to derive the local solidification speed from microstructure analysis.

Authors with CRIS profile

Markus Döring Lehrstuhl für Photonische Technologien Michael Schmidt Lehrstuhl für Photonische Technologien

Involved external institutions

Access e.V. DE Germany (DE)

How to cite

APA:

Apel, M., Boussinot, G., Döring, M., & Schmidt, M. (2020). Eutectic solidification in Al-Ni for L-PBF conditions: A phase-field simulation study. In M. Schmidt, F. Vollertsen, E. Govekar (Eds.), Procedia CIRP (pp. 64-68). Virtual, Online: Elsevier B.V..

MLA:

Apel, M., et al. "Eutectic solidification in Al-Ni for L-PBF conditions: A phase-field simulation study." Proceedings of the 11th CIRP Conference on Photonic Technologies, LANE 2020, Virtual, Online Ed. M. Schmidt, F. Vollertsen, E. Govekar, Elsevier B.V., 2020. 64-68.

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