Pressureless sintering of cold sprayed Inconel 718 deposit

Levasseur, David; Yue, Stephen; Brochu, Mathieu

doi:10.1016/j.msea.2012.06.097

Cited by 48 publications

(19 citation statements)

References 28 publications

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“…Ni-based superalloys [195,196] High-temperature applications NiTi [197,198] Shape memory Nanocrystals Steel 316L, 304L [134,[199][200][201] Heat treatment Phase transformation Stellite [202][203][204] Wear resistance Ta [197,198] Oxygen evolution reaction Corrosion protection Ti [205,206] Review Zn, Zn alloys [176,207] Printing rolls Corrosion protection CS is a particularly attractive method for the deposition of metastable materials such as metallic glasses, without dimensional restriction. In this respect, CS may be considered as the only practical method through which bulk metallic glasses of any size may be produced.…”

Section: Metallic Materialsmentioning

confidence: 99%

Cold spraying – A materials perspective

et al. 2016

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Cold spraying is a solid-state powder deposition process with several unique characteristics, allowing production of coatings or bulk components from a wide range of materials. The process has attracted much attention from academia and industry over the past two decades.The technical interest in cold spraying is twofold: first as a coating process for applications in surface technology, and second as a solid-state additive manufacturing process, offering an alternative to selective laser melting or electron beam melting methods. Moreover, cold spraying can be used to study materials behaviour under extremely high strain rates, high pressures and high cooling rates. The cold spraying process is thus considered to be relevant for various industrial applications, as well as for fundamental studies in materials science.This article aims to provide an overview of the cold spray process, the current understanding of the deposition mechanisms, and the related models and experiments, from a materials science perspective. IntroductionCold spraying (CS) is a solid-state material deposition technique, where micron-sized particles of a powder bond to a substrate as a result of high-velocity impact and the associated severe plastic deformation. Acceleration of particles to high velocities is obtained via expansion of a pressurised and (ironically) 'hot' gas through a diverging-converging nozzle.Despite heating the process gas -which is to provide higher acceleration of the gas and also to facilitate particle deformation through thermal softening -the feedstock remains in the solid state throughout the entire process; hence the name 'cold' spraying. This is to underline the contrast to conventional thermal spraying where particles are completely or partially molten upon impact onto the substrate. Alternative terminology includes cold gas spray, micro cold spray, cold gas dynamic spray, kinetic spray, supersonic particle deposition and metal powder application (MPA), all of which refer to the same principle of solid-state powder deposition as described above. CS is used for coating and repair. It is also used for additive manufacturing (AM) at relatively high deposition rates as compared to the methods based on selective laser or electron beam melting. The main advantage of CS is that it alleviates the problems associated with high temperature processing of materials, such as oxidation and unfavourable structural changes. It is possibly the only continuous method to produce bulk components of metastable materials that are available only in the powder form, e.g. as obtained from mechanical attrition or gas atomisation. The aim of the present paper is to provide an overview of CS from a materials perspective, particularly for a broader audience in materials research, e.g. with interest in dynamic phenomena, plasticity and phase transformations. In terms of application and properties, CS is perhaps best to be compared to thermal spraying processes, as in [24,25]. In view of relevant physical phenomena, however, CS is mos...

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Section: Metallic Materialsmentioning

confidence: 99%

Cold spraying – A materials perspective

et al. 2016

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“…For the repair application, INCONEL 718 is an interesting material as it is often used in aircraft components (Ref 11). Several investigations have been made on the deposition of INCONEL 718 by cold spray processes (Ref [12][13][14] demonstrating that INCONEL 718 parts can be successfully manufactured by cold spray. In a recent publication, additions of a martensitic stainless steel have been used to obtain high-density coatings (Ref 15).…”

Section: Introductionmentioning

confidence: 99%

Correlation of Microstructure and Properties of Cold Gas Sprayed INCONEL 718 Coatings

et al. 2020

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In the cold gas spray process, deposition of particles takes place through intensive plastic deformation upon impact in a solid state at temperatures well below their melting point. The high particle impact velocities and corresponding peening effects can lead to high compressive residual stresses in cold spray coatings. This can be advantageous with regard to mechanical properties as fatigue life and hence, cold spray is an ideal process for repair applications. In this study, INCONEL 718 particles were cold sprayed by using nitrogen as propellant gas. The deposited coatings with different thicknesses were characterized using electron microscopy techniques to study grain refinement and precipitates in the coating. In addition, depth-resolved residual stress measurements have been performed by the incremental hole drilling method. The residual stress depth profiles in the coatings indicate compressive residual stresses of several hundred MPa which are hardly influenced by the coating thickness. In addition, large compressive stress levels are found in surface-near regions of the substrate due to the grit blasting process. Furthermore, a post-heat treatment analysis was performed to investigate its influence on residual stresses and bonding strength. These findings are used to develop a consistent explanation of the dependence of strength values on thickness.

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“…It is very difficult to deposit dense parts from superalloys even using CS at high gas temperatures [116], so there has been a great focus on investigation of the post-heat treatments routes. It has been shown that high temperature heat treatment as well as the use of helium gas can effectively enhance properties of the CSAMed superalloys [117]. Levasseur et al [118] proposed a pressureless sintering process to decrease porosity of Inconel 718 deposits from 2.5% to 0.2% and improve flexural strength and ductility.…”

Section: Cold Spray Am (Csam)mentioning

confidence: 99%

Beamless Metal Additive Manufacturing

2020

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The propensity to manufacture functional and geometrically sophisticated parts from a wide range of metals provides the metal additive manufacturing (AM) processes superior advantages over traditional methods. The field of metal AM is currently dominated by beam-based technologies such as selective laser sintering (SLM) or electron beam melting (EBM) which have some limitations such as high production cost, residual stress and anisotropic mechanical properties induced by melting of metal powders followed by rapid solidification. So, there exist a significant gap between industrial production requirements and the qualities offered by well-established beam-based AM technologies. Therefore, beamless metal AM techniques (known as non-beam metal AM) have gained increasing attention in recent years as they have been found to be able to fill the gap and bring new possibilities. There exist a number of beamless processes with distinctively various characteristics that are either under development or already available on the market. Since this is a very promising field and there is currently no high-quality review on this topic yet, this paper aims to review the key beamless processes and their latest developments.

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Pressureless sintering of cold sprayed Inconel 718 deposit

Cited by 48 publications

References 28 publications

Cold spraying – A materials perspective

Cold spraying – A materials perspective

Correlation of Microstructure and Properties of Cold Gas Sprayed INCONEL 718 Coatings

Beamless Metal Additive Manufacturing

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