Particle size effects in metallic microparticle impact-bonding

Ian Dowding; Mostafa Hassani; Yuchen Sun; David Veysset; Keith A. Nelson; Christopher A. Schuh

doi:10.1016/j.actamat.2020.04.044

Particle size effects in metallic microparticle impact-bonding

Ian Dowding, Mostafa Hassani^*, Yuchen Sun, David Veysset, Keith A. Nelson, Christopher A. Schuh

^*Corresponding author for this work

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65 Scopus citations

Abstract

In cold spray processing of metals, the critical velocity for particle bonding is dependent on both intrinsic material properties, such as density and (spall) strength, and extrinsic process parameters, such as the powder particle size. In this work, we specifically isolate and investigate particle size effects on the critical velocity for bonding through laser-induced single particle impact experiments and finite element simulations. We also present a predictive framework to correlate particle size and critical velocity. We show that an increase in particle size leads to an increase in the temperature of the jet formed at the interface of the particle and the substrate. This increased temperature locally decreases the spall strength of the material which, in turn, decreases the critical velocity for larger particles.

Original language	English (US)
Pages (from-to)	40-48
Number of pages	9
Journal	Acta Materialia
Volume	194
DOIs	https://doi.org/10.1016/j.actamat.2020.04.044
State	Published - Aug 1 2020

Funding

This work was primarily supported at MIT by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0018091.

Keywords

Bonding
Cold spray
Critical velocity
High-velocity Impacts
Particle deformation
Size effects

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2020.04.044

Cite this

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title = "Particle size effects in metallic microparticle impact-bonding",

abstract = "In cold spray processing of metals, the critical velocity for particle bonding is dependent on both intrinsic material properties, such as density and (spall) strength, and extrinsic process parameters, such as the powder particle size. In this work, we specifically isolate and investigate particle size effects on the critical velocity for bonding through laser-induced single particle impact experiments and finite element simulations. We also present a predictive framework to correlate particle size and critical velocity. We show that an increase in particle size leads to an increase in the temperature of the jet formed at the interface of the particle and the substrate. This increased temperature locally decreases the spall strength of the material which, in turn, decreases the critical velocity for larger particles.",

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author = "Ian Dowding and Mostafa Hassani and Yuchen Sun and David Veysset and Nelson, {Keith A.} and Schuh, {Christopher A.}",

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AU - Dowding, Ian

AU - Hassani, Mostafa

AU - Sun, Yuchen

AU - Veysset, David

AU - Nelson, Keith A.

AU - Schuh, Christopher A.

PY - 2020/8/1

Y1 - 2020/8/1

N2 - In cold spray processing of metals, the critical velocity for particle bonding is dependent on both intrinsic material properties, such as density and (spall) strength, and extrinsic process parameters, such as the powder particle size. In this work, we specifically isolate and investigate particle size effects on the critical velocity for bonding through laser-induced single particle impact experiments and finite element simulations. We also present a predictive framework to correlate particle size and critical velocity. We show that an increase in particle size leads to an increase in the temperature of the jet formed at the interface of the particle and the substrate. This increased temperature locally decreases the spall strength of the material which, in turn, decreases the critical velocity for larger particles.

AB - In cold spray processing of metals, the critical velocity for particle bonding is dependent on both intrinsic material properties, such as density and (spall) strength, and extrinsic process parameters, such as the powder particle size. In this work, we specifically isolate and investigate particle size effects on the critical velocity for bonding through laser-induced single particle impact experiments and finite element simulations. We also present a predictive framework to correlate particle size and critical velocity. We show that an increase in particle size leads to an increase in the temperature of the jet formed at the interface of the particle and the substrate. This increased temperature locally decreases the spall strength of the material which, in turn, decreases the critical velocity for larger particles.

KW - Bonding

KW - Cold spray

KW - Critical velocity

KW - High-velocity Impacts

KW - Particle deformation

KW - Size effects

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Particle size effects in metallic microparticle impact-bonding

Abstract

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Keywords

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