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Open AccessArticle

Reproducibility of High-Throughput Sample Properties Produced by a High-Temperature Molten Metal Droplet Generator

1
Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, 28359 Bremen, Germany
2
Leibniz Institute for Materials Engineering—IWT, Badgasteiner Straße 3, 28359 Bremen, Germany
3
Chemical Process E ngineering Group, University of Bremen, Leobener Strasse 6, 28359 Bremen, Germany
*
Author to whom correspondence should be addressed.
Metals 2020, 10(3), 297; https://doi.org/10.3390/met10030297
Received: 7 February 2020 / Revised: 21 February 2020 / Accepted: 22 February 2020 / Published: 25 February 2020
A high-throughput method for the discovery of structural materials requires a large number of samples with highly reproducible properties. We propose using spherical micro-samples, which can be quickly produced by molten metal single droplet processes with high geometrical reproducibility. However, geometrical reproducibility does not automatically yield in the reproducibility of specific properties that are governed by the microstructure and thermal history of the samples. This work evaluates the reproducibility of two different steels (AISI D3 and 5140) in their as-synthesized state without additional heat treatment. By determining a set of well-established high-throughput descriptors by electrochemical analysis, particle-oriented peening, and micro machining, we show that high reproducibility can be achieved. Additionally, the determined properties correlate well with their austenitic (AISI D3) and martensitic (AISI5140) state. The AISI D3 shows an improved corrosion resistance, increased cutting forces during machining, and a higher deformation during particle-oriented peening. The reproducibility of the sample synthesis indicates that this type of sample is well suited for high-throughput methods to find new structural materials. View Full-Text
Keywords: high-throughput; droplet; containerless cooling; solidification; material characterization; plastic deformation; particle-oriented peening; micro machining; cutting force high-throughput; droplet; containerless cooling; solidification; material characterization; plastic deformation; particle-oriented peening; micro machining; cutting force
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MDPI and ACS Style

Imani Moqadam, S.; Baune, M.; Bösing, I.; Heinzel, C.; Meyer, D.; Thomann, A.; Wielki, N.; Ellendt, N. Reproducibility of High-Throughput Sample Properties Produced by a High-Temperature Molten Metal Droplet Generator. Metals 2020, 10, 297.

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