Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/20844
Title: Particle Compression Test: A Key Step towards Tailoring of Feedstock Powder for Cold Spraying
Authors: Assadi, H
Gärtner, F
Keywords: cold spray;powder;characterisation;mechanical properties;particle compression
Issue Date: 9-May-2020
Publisher: MDPI AG
Citation: Assadi, H. and Gärtner, F. (2020) ‘Particle Compression Test: A Key Step towards Tailoring of Feedstock Powder for Cold Spraying’, Coatings. MDPI AG, 10 (5). 458, pp. 1-11. doi: 10.3390/coatings10050458.
Abstract: Copyright © 2020 by the authors. Cold spray is on the way to becoming a mainstream technology for coating and additive manufacturing processes. While there have been many advances in various aspects of this technology, the question of tailoring the ‘ideal’ feedstock powder for cold spraying has remained open. In particular, the mechanical strength and its dependence on the particle size, which are amongst the most relevant properties of the feedstock powder for cold spraying, are rarely covered when reporting powder specifications. This is mainly because of the lack of standardised methods of characterisation for these specific properties. In the present case study, we demonstrate how compression tests of single Inconel 718 particles by using a modified nanoindenter can address this central question. Data analyses are supported by finite element modelling of particle compression for a range of plastic behaviours. The results of simulation are then stored in the form of a surrogate model for subsequent comparison with the experimental data. Thus, the ultimate tensile strength and the size of the examined particles are calculated directly from the measured force-displacement data. The paper will also discuss how this information can be used to optimise cold spraying, and so, unveils a key step towards the design and manufacturing of cold-spray-specific feedstock powder.
URI: https://bura.brunel.ac.uk/handle/2438/20844
DOI: https://doi.org/10.3390/coatings10050458
Other Identifiers: 458
Appears in Collections:Brunel Centre for Advanced Solidification Technology (BCAST)

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