Microstructural Characteristics and Residual Stresses in Arc-Sprayed Cermet Coatings Using Different Carbide Grain Size Fractions

Tillmann, Wolfgang; Hagen, Leif; Luo, Weiping; Chehreh, Abootorab Baqerzadeh

doi:10.1007/s11666-018-0745-8

Cited by 3 publications

(2 citation statements)

References 75 publications

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“…However, when compared to the nominal composition of the fabricated cored wire, some carbide loss was determined as a reduced amount of W was observed in the deposits. As previously reported in [64], one possible reason could be that a reduced amount of W-rich spray particles impinges onto the substrate, either due to an amended trajectory of some particles or a rebound of not fully fused CTC particles.…”

Section: Resultsmentioning

confidence: 85%

Machine Hammer Peening and Its Effect on the Surface Integrity of Arc-Sprayed WC-W2C-FeCMnSi Coatings

Hagen,

Baumann,

Heidelmann

et al. 2023

Coatings

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With respect to post-processing techniques in the field of surface engineering, it was recently found that machine hammer peening (MHP) represents a promising approach to functionalizing thermally sprayed coatings as the MHP contributes to a compression of the coating, enabling the potential to reduce the coating porosity as well as the protruding peaks of the rough as-sprayed coating surface. The MHP also has the potential to induce compressive residual stresses in the coating surface, which can positively affect the mechanical and tribological properties. Arc-sprayed tungsten carbide-reinforced Fe-based coatings pose an appropriate candidate to counteract the wear of tribologically stressed surfaces. Due to the inherent process characteristics, however, these coatings are mostly characterized by a heterogeneous lamellar microstructure with residual porosity and interstratified with a certain amount of oxides, as well as the presence of tensile residual stresses. To adjust their microstructural and mechanical coating properties, the applicability of a subsequent MHP was evaluated in this study. Therefore, arc-sprayed WC-W2C reinforced FeCMnSi coatings are deposited using either argon or compressed air as atomization and shroud gas, providing different lamellar structures and oxide content. The effect of MHP on the surface integrity of the WC-W2C-FeCMnSi coating is investigated with respect to its porosity, lamellar structure, hardness, and residual stresses, which are known as relevant influencing factors on the performance of tribologically stressed components. It was found that the MHP leads to reduced porosity and lamella thickness as well as increased hardness due to strain hardening effects. Furthermore, it was demonstrated that the MHP leads to the introduction of compressive residual stresses, which contribute to a decline in tensile residual stresses in the near-surface area.

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Section: Resultsmentioning

confidence: 85%

Machine Hammer Peening and Its Effect on the Surface Integrity of Arc-Sprayed WC-W2C-FeCMnSi Coatings

Hagen,

Baumann,

Heidelmann

et al. 2023

Coatings

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“…Thick coatings of order of several mm are produced by overlaying techniques, including plasma transferred arc welding from powder mixtures [4,5]. In turn, coatings of smaller thicknesses designed to large surfaces can be deposited by different techniques of spraying, including flame spraying, HVOF, HVAF, plasma spraying, cold spraying and arc spraying [6,7]. Spraying process is characterized by a much higher efficiency than hardfacing.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ni-WC Thermal Sprayed Composite Coatings

Bober

Jakubowski

Radziszewski³

et al. 2018

Advances in Materials Science

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Abstact The paper presents results of investigations of the microstructure and selected properties of improved composite coatings consisting mainly of nickel matrix reinforced by WC particles. The coatings were obtained by flame spraying of powders mixture on non-alloy steel substrates with following material remelting. Structural investigations were performed using both optical and electron microscopy. The distribution of microhardness and abrasion resistance of deposited coatings were also determined. The complex structure of coatings and resulting high wear withstand are the consequence of an intensive action of liquid matrix with dissolving tungsten carbide particles and formation of secondary phases.

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Developing rotary swaging process for improving the performance of wire-arc sprayed Al/Al2O3 composite coating

Zhao,

Lu,

et al. 2024

Surface and Coatings Technology

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Microstructural Characteristics and Residual Stresses in Arc-Sprayed Cermet Coatings Using Different Carbide Grain Size Fractions

Cited by 3 publications

References 75 publications

Machine Hammer Peening and Its Effect on the Surface Integrity of Arc-Sprayed WC-W2C-FeCMnSi Coatings

Machine Hammer Peening and Its Effect on the Surface Integrity of Arc-Sprayed WC-W2C-FeCMnSi Coatings

Microstructure and Mechanical Properties of Ni-WC Thermal Sprayed Composite Coatings

Developing rotary swaging process for improving the performance of wire-arc sprayed Al/Al2O3 composite coating

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