A method of determining the mechanical properties of a two-layer composite consisting of a steel matrix and a plasma spray coating based on amorphizing powders

Podrezov, Yu. N.; Milman, Yu.V.; Lotsko, D. V.; Lugovoi, N. I.; Verbilo, D. G.; Efimov, N. A.

doi:10.1007/bf02675765

Cited by 3 publications

(2 citation statements)

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“…Because the preparation of the specimen is less complex, bending tests are more popular than tensile tests ( Ref 6,7,20,32,35,39). However, as mentioned previously, the preparation of freestanding coatings with low surface roughness is necessary to calculate authentic mechanical values for the sprayed layer.…”

Section: Introductionmentioning

confidence: 98%

“…These characteristics derive from the inhomogeneous microstructure. Surface roughness, microcracks, pores, oxides, hard phases, and weak splat-to-splat interfaces within the coating lead to strain localizations and decrease the YoungÕs modulus, ultimate strength, durability, and ductility ( Ref 20,[32][33][34]. Combined with residual stresses in the coating, these integrated notches promote the crack initiation and propagation (Ref 6,35).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Mechanical Properties of an Arc Sprayed WC-FeCSiMn Coating: Compression, Bending, and Tension Behavior

Tillmann

Nebel

2010

J Therm Spray Tech

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This paper is concerned with the elastic and plastic forming behavior of arc sprayed WC-FeCSiMn coatings. The mechanical properties were investigated by indentation, bending, and tensile tests. These were performed on coated mild steel substrates as well as spark eroded and ground freestanding coatings with different geometries. The results of the indentation, bending, and tensile tests were evaluated concerning the coating microstructure, element, and pore distribution, as well as the local microhardness. The critical role of pores and inhomogeneities within the sprayed coating was examined in detail. Microand macrocracking were investigated by scanning electron microscopy after the indentation and tensile tests. It was figured out that the WC-FeCSiMn coating featured a distinctive brittle behavior. During the bending and tension tests, brittle forced fracture of the layer appeared almost without plastic deformations. A significant difference was determined between the compression and tensile performance of the coating. For instance, the YoungÕs modulus for compression strains was measured to be approximately 60% higher than the tension case.

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