Correlation between the Energy Input and the Microstructure of Additively Manufactured Cobalt-Chromium

Abstract:

Powder-bed based additive manufacturing techniques are of high interest for the medical sector and recent trial studies have shown their feasibility. Due to the rapid improvements made in the machinery and the related changes in the type and characteristics of the utilized power source, optimizations regarding the fabrication parameters tend to differ amongst various machines. In this study, a parameter optimization was undertaken for a biocompatible dental CoCrMo alloy on a SLM 280HL machine, featuring a 400 W fibre laser. It was shown that the availability of higher laser powers enables a more energy efficient fabrication. Moreover, parameter sets for fast and economic fabrication, as well as for high density and fine-grained microstructure, were defined.

• Periodical: Defect and Diffusion Forum (Volume 379)
• Pages: 157-165
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.379.157
• Online since: November 2017
• Authors: Leonhard Hitzler, Philipp Williams, Markus Merkel, Wayne Hall, Andreas Öchsner
• Keywords: Cracks, Efficiency, Micro-Hardness, Relative Density

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