Apel M, Boussinot G, Döring M, Schmidt M (2020)
Publication Type: Conference contribution
Publication year: 2020
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
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.
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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