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

Metals MDPI

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.

Authors with CRIS profile

Martin Gotterbarm Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Alexander Rausch Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

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://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).

BibTeX: Download