Effect of Heat Treatment on the Microstructure and Mechanical Properties of Stainless Steel 316L Coatings Produced by Cold Spray for Biomedical Applications

AlMangour, Bandar; Vo, Phuong; Mongrain, Rosaire; Irissou, Éric; Yue, Stephen

doi:10.1007/s11666-013-0053-2

Cited by 96 publications

(56 citation statements)

References 27 publications

(19 reference statements)

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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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“…The specific build-up mechanisms of cold spraying, which usually imparts a high degree of work hardening to the powder particles (Ref 5) and post-deposition residual stresses (Ref 6,7), can lead to low-ductility coatings. Post-deposition heat treatments have been shown to improve the properties (Ref 8,9,10,11).…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution in Solution Heat Treatment of Gas-Atomized Al Alloy (7075) Powder for Cold Spray

2017

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Cold gas dynamic spray is being explored as a repair technique for high-value metallic components, given its potential to produce pore and oxide-free deposits of between several micrometers and several millimeters thick with good levels of adhesion and mechanical strength. However, feedstock powders for cold spray experience rapid solidification if manufactured by gas atomization and hence can exhibit non-equilibrium microstructures and localized segregation of alloying elements. Here, we used sealed quartz tube solution heat treatment of a precipitation hardenable 7075 aluminum alloy feedstock to yield a consistent and homogeneous powder phase composition and microstructure prior to cold spraying, aiming for a more controllable heat treatment response of the cold spray deposits. It was shown that the dendritic microstructure and solute segregation in the gas-atomized powders were altered, such that the heat-treated powder exhibits a homogeneous distribution of solute atoms. Micro-indentation testing revealed that the heat-treated powder exhibited a mean hardness decrease of nearly 25% compared to the as-received powder. Deformation of the powder particles was enhanced by heat treatment, resulting in an improved coating with higher thickness (* 300 lm compared to * 40 lm for untreated feedstock). Improved particlesubstrate bonding was evidenced by formation of jets at the particle boundaries.

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“…The existence of residual stress and work hardening in cold-sprayed coating decreases its mechanical, thermal and electrical properties. Some researches about the improvement of cold-sprayed coating via heat treatment were reported [14,15,[20][21][22][23][24]. Heat treatment can effectively change the microstructure of cold-sprayed Cu [14,15,20], Al [21], stainless steel coatings [22,23] and Inconel 718 [24].…”

Section: Introductionmentioning

confidence: 99%