Site-specific study of jetting, bonding, and local deformation during high-velocity metallic microparticle impact

Tiamiyu, A.A.; Sun, Yuchen; Nelson, Keith A.; Schuh, Christopher A.

doi:10.1016/j.actamat.2020.10.057

Cited by 48 publications

(15 citation statements)

References 40 publications

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“…As Particle 2 rebounds, it can be hit back towards the substrate by an on-coming Particle 3, causing the adhesion of Particle 2 to the substrate. It is *Although an increase in v i increases adhesion and DE, new findings show they decrease at very high velocity [25,26].…”

Section: Mechanisms Of Bonding and Objective Of The Studymentioning

confidence: 96%

“…What causes the departure of v ASI and v jetting from v cr Although v ASI and v jetting can be a good approximation of v cr , there are possible reasons why ASI and jetting could occur prior to bonding, and by extension, the departure of v ASI [129] under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License; (e) SEM micrographs of impact sites as Cu particle impact Cu substrate at different impact velocities, reprinted with permission from Ref. [25], copyright 2021 Elsevier. In (a-d, f, g), S p and S s are shock wave in particle and substrate, respectively, ϕ is the deflection angle, and α is impact angle or wedge angle.…”

Section: Adiabatic Shear Instability and Jettingmentioning

confidence: 99%

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Recent advances on bonding mechanism in cold spray process: A review of single-particle impact methods

Adaan-Nyiak

Tiamiyu

2022

Journal of Materials Research

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Cold spray (CS) processing is a layer-by-layer solid-state deposition process in which particles at a temperature below their melting point are launched to sufficiently high velocities to adhere to a substrate (and previously deposited particles), forming coatings/parts. Despite being in existence for over four decades, particle bonding mechanisms in the CS process are unclear due to the complex particle–particle/carrier gas interactions that obscure assessment. This review evaluates recent findings from single-particle impact approaches that circumvent these complexities and further provide new insights on bonding mechanisms. Theories on the evolution of oxide layer breakup and delamination, adiabatic shear instability, jetting, melting, and interface solid-state amorphization that contributes to bonding are assessed and carefully reviewed. Although there is a unified condition in which bonding sets on, this study shows that no singular theory explains bonding mechanism. Rather, dominant mechanism is a function of the prevailing barriers unique to each impact scenario. Graphical abstract

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Section: Mechanisms Of Bonding and Objective Of The Studymentioning

confidence: 96%

Section: Adiabatic Shear Instability and Jettingmentioning

confidence: 99%

Recent advances on bonding mechanism in cold spray process: A review of single-particle impact methods

Adaan-Nyiak

Tiamiyu

2022

Journal of Materials Research

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“…In this way, the particles impact the substrate leading to the jetting formation, the oxide layer surrounding the particles is destroyed, and a pure metal-to-metal bond is achieved, resulting in greater deformation of the particles. Note that it is the jetting that leads to the bonding due to a high deformation rate at the particle-substrate interface [105]. Under these conditions, the metallurgical bonding for cold spray, which is connected to adiabatic shear instability to occur, is limited to the metallic substrate; that means that the only possible bonding mechanism for the polymer substrate is the mechanical interlocking.…”

Section: Theories Of Bonding Mechanisms In Cold Spraymentioning

confidence: 99%

Cold spray deposition of metallic coatings on polymers: a review

et al. 2021

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Cold spray deposition, which can be framed in the wider family of additive manufacturing, is a manufacturing technique that is able to produce coatings on diverse types of substrates through the deposition of feedstock powder. As a low-temperature process, cold spray represents a potential solution for the metallization of temperature-sensitive materials, i.e. polymers and polymer matrix composites. The study of the cold spray technology for the metallization of polymers is still in its early stage, and the deposition mechanisms of metals on polymer-based materials are not thoroughly understood yet. On these premises, a review on this topic is needed to systematically depict the actual state of the art and to provide a reliable and well-organized overview discussing all the theories arisen in these years. In summary, this review aims: i) to collect all the available literature and enucleate the most discussed and interesting points (the most prevailing theories regarding the bonding mechanisms, the influence of the different process parameters and the main characteristics of cold-sprayed coating), providing a reliable and well-organized state of the art; ii) to define the open questions and to delineate the directions of future work.

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“…Moreover, the particle has the phenomenon of fragment, and the fragmentation increases with the increase of the particle impact velocity and impact angle. Tiamiyu et al [10] studied the rebound characteristics of copper particles impacting with copper surface at ultra-high velocity, and they showed that when the incident velocity was between 100 m/s and 590 m/s, the particle recovery coefficient decreased with the increase of incident velocity. Wall et al [11] used Laser Doppler measurement technology to measure the incident velocity and rebound velocity of luciferin ammonium particles in the process of collision with different materials and obtained the critical capture velocity of particles under different working conditions.…”

Section: Introductionmentioning

confidence: 99%

The Critical Capture Velocity of Coal Ash Particles Oblique Impact on a Stainless Steel Surface

Xie

et al. 2021

Energies

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In this paper, the rebound characteristics of coal ash particles impacting on a stainless steel surface are studied experimentally with the background of ash deposition on the heating surface of the boiler. The impact processes of coal ash particles with different incident angles were recorded by high-speed digital camera technology. The evolution of the normal restitution coefficient with incident normal velocity was obtained. Three different static contact theories are used to establish the equations of motion to predict the critical capture velocity of particles. The results show that the normal restitution coefficient first increases and then decreases with the increase of incident normal velocity. The critical capture velocity of particles under the three models was predicted. It is found that the prediction results of the Brach and Dunn (BD) model for the critical capture velocity are close to the experimental results. Taking the particle of size 23 μm as an example, the maximum critical capture velocity predicted by BD model is 1.0611 m/s at 0° incident angle. The minimum value is 0.7940 m/s when the incident angle is 45°.The critical capture velocity of particles decreases with the increase of incident angle and with the increase of particle diameter.

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Site-specific study of jetting, bonding, and local deformation during high-velocity metallic microparticle impact

Cited by 48 publications

References 40 publications

Recent advances on bonding mechanism in cold spray process: A review of single-particle impact methods

Recent advances on bonding mechanism in cold spray process: A review of single-particle impact methods

Cold spray deposition of metallic coatings on polymers: a review

The Critical Capture Velocity of Coal Ash Particles Oblique Impact on a Stainless Steel Surface

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