Cold spray deposition characteristic and bonding of CrMnCoFeNi high entropy alloy

Nikbakht, Roghayeh; Saadati, Mohammad; Kim, Taek‐Soo; Jahazi, Mohammad; Kim, Hyoung Seop; Jodoin, B.

doi:10.1016/j.surfcoat.2021.127748

Cited by 34 publications

(8 citation statements)

References 59 publications

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“…However, the extensive grain boundary network and presence of porosity within the CS coating has shown an increase in internal oxidation otherwise not detected in bulk HEA material (Ref 373 ). This is related to the fact that CS deposition of HEAs is challenging (Ref 367 ) mainly due to their excellent work hardening and low thermal softening (Ref 367 ). Hence, optimization of CS process parameters in the deposition of HEA should be the near-term focus.…”

Section: Cold Spray Application Pillars (Past Present and Future)mentioning

confidence: 99%

Cold Spray: Over 30 Years of Development Toward a Hot Future

et al. 2022

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Cold Spray (CS) is a deposition process, part of the thermal spray family. In this method, powder particles are accelerated at supersonic speed within a nozzle; impacts against a substrate material triggers a complex process, ultimately leading to consolidation and bonding. CS, in its modern form, has been around for approximately 30 years and has undergone through exciting and unprecedented developmental steps. In this article, we have summarized the key inventions and sub-inventions which pioneered the innovation aspect to the process that is known today, and the key breakthroughs related to the processing of materials CS is currently mastering. CS has not followed a liner path since its invention, but an evolution more similar to a hype cycle: high initial growth of expectations, followed by a decrease in interest and a renewed thrust pushed by a number of demonstrated industrial applications. The process interest is expected to continue (gently) to grow, alongside with further development of equipment and feedstock materials specific for CS processing. A number of current applications have been identified the areas that the process is likely to be the most disruptive in the medium-long term future have been laid down.

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Section: Cold Spray Application Pillars (Past Present and Future)mentioning

confidence: 99%

Cold Spray: Over 30 Years of Development Toward a Hot Future

et al. 2022

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“…Known as the kinetic energy based additive manufacturing solution, the build-up occurs when powder particles impact and plastically deform on the prior layer. This high strain rate deformation results in a combination of plastic deformation and hydrodynamic jetting [4] and adiabatic shear instability [5] at the surface of the powder creating anchoring points that result in exceptional high bond strength that the CS process is known for [6]. The coating also benefits from mechanical interlocking [7] and break up of its peripheral oxide layer [8] which enables metallurgical bonding [6,9].…”

Section: Introductionmentioning

confidence: 99%

An Attempt to Understand Stainless 316 Powders for Cold-spray Deposition

Karmarkar¹,

Varadaraajan²,

Mohanty³

et al. 2023

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Cold gas dynamic spray (CS) is a unique technique to deposit material using high strain rate solid state deformation. A major challenge for this technique is its dependence on the powder properties and lack of standards to assess them between lots and manufacturers. The motivation of this research was to understand the variability in powder atomization techniques for stainless steel powders and their subsequent properties for their corresponding impact on CS. A drastic difference (~30%) was observed in deposition efficiencies (DE) of unaltered, spherical, and similar sized stainless steel (316) powders produced using centrifugal (C.A) and traditional gas atomization (G.A) techniques. The study highlights more on differences on precursor level. Using recent advancements in large scale statistical measurements like laser diffraction shape analysis, µCT scanning, traditional methods like EBSD, nano-indentation, an attempt is made to understand the powder property. Insights on powder size and shape are documented. Significant differences were observed between C.A and G.A powders in terms of grain size, fraction of higher angle grain boundaries (HAGB) and nano hardness. The outcomes of this study would be helpful to understand the commercialization of the cold-spray process for bulk manufacturing of powder precursors

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“…This is largely due to the compressive stresses that are generated from the mechanical interlocking and peening-like effects of the impacted particles, whereas tensile stresses occur from the particle heating of more thermal-based technologies [21,24,29]. Common material systems that have been reported to have sufficient bonding strength for CS coatings include but are not limited to metals (such as aluminum, titanium or nickel), their alloys (such as high-entropy alloys or Inconel), and various composites (such as metal matrix composites) [30][31][32][33][34][35][36]. For example, Chen et al [37] found that by applying CS 316L and 316L-SiC coatings to AZ80 Mg-alloys (as a soft substrate) resulted with a very high bonding strengths being recorded at both 48 ± 7 and 53 ± 9 MPa.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gas Propellant Temperature on the Microstructure, Friction, and Wear Resistance of High-Pressure Cold Sprayed Zr702 Coatings on Al6061 Alloy

et al. 2022

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For the first time, Zr702 coatings were deposited onto an Al6061 alloy using a high-pressure cold spray (HPCS) system. In this work, five different N2 process gas temperatures between 700 and 1100 °C were employed to understand the formation of cold sprayed (CS) Zr coatings and their feasibility for enhanced wear resistance. Results indicated that the N2 processing gas temperature of about 1100 °C enabled a higher degree of particle thermal softening, which created a dense, robust, oxide- and defect-free Zr coating. Across all CS Zr coatings, there was a refinement of crystallinity, which was attributed to the severe localized plastic deformation of the powder particles. The enhanced thermal boost up zone at the inter-particle boundaries and decreased recoverable elastic strain were accountable for the inter-particle bonding of the coatings at higher process gas temperatures. The flattening ratio (ε) increased as a function of temperature, implying that there was a greater degree of plastic deformation at higher N2 gas temperatures. The microhardness readings and wear volume of the coatings were also improved as a function of process gas temperature. In this work, the wear of the Al6061 alloy substrate was mainly plowing-based, whereas the Zr CS substrates demonstrated a gradual change of abrasive to adhesive wear. From our findings, the preparation of CS Zr coatings was a feasible method of enhancing the wear resistance of Al-based alloys.

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Cold spray deposition characteristic and bonding of CrMnCoFeNi high entropy alloy

Cited by 34 publications

References 59 publications

Cold Spray: Over 30 Years of Development Toward a Hot Future

Cold Spray: Over 30 Years of Development Toward a Hot Future

An Attempt to Understand Stainless 316 Powders for Cold-spray Deposition

Effect of Gas Propellant Temperature on the Microstructure, Friction, and Wear Resistance of High-Pressure Cold Sprayed Zr702 Coatings on Al6061 Alloy

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