Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing

Gotterbarm M, Rausch A, Körner C (2020)


Publication Language: English

Publication Type: Journal article

Publication year: 2020

Journal

DOI: 10.3390/met10030313

Abstract

Selective Electron Beam Melting (SEBM) is a powder bed-based additive manufacturing process for metals. As the electron beam can be moved inertia-free by electromagnetic lenses, the solidification conditions can be deliberately adjusted within the process. This enables control over the local solidification conditions. SEBM typically leads to columnar grain structures. Based on numerical simulation, we demonstrated how technical single crystals develop in IN718 by forcing the temperature gradient along a µ-Helix. The slope of the µ-Helix, i.e., the deviation of the thermal gradient from the build direction, determined the effectiveness of grain selection right up to single crystals.

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How to cite

APA:

Gotterbarm, M., Rausch, A., & Körner, C. (2020). Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing. Metals. https://dx.doi.org/10.3390/met10030313

MLA:

Gotterbarm, Martin, Alexander Rausch, and Carolin Körner. "Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing." Metals (2020).

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