Particle size effects in metallic microparticle impact-bonding
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...
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| Veröffentlicht in: | Acta materialia 2020-08, Vol.194, p.40-48 |
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| container_title | Acta materialia |
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| creator | Dowding, Ian Hassani, Mostafa Sun, Yuchen Veysset, David Nelson, Keith A. Schuh, Christopher A. |
| description | 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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| doi_str_mv | 10.1016/j.actamat.2020.04.044 |
| format | Article |
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| identifier | ISSN: 1359-6454 |
| ispartof | Acta materialia, 2020-08, Vol.194, p.40-48 |
| issn | 1359-6454 1873-2453 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1658603 |
| source | Elsevier ScienceDirect Journals |
| subjects | Bonding Cold Spray Critical Velocity High-velocity Impacts MATERIALS SCIENCE Particle Deformation Size Effects |
| title | Particle size effects in metallic microparticle impact-bonding |
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