Determination of Residual Stresses in Multimaterial, Multilayer Pieces — Adaptation to Ceramic Coatings

Laracine, M.; Bignon, C.; Lormand, M.; Vannes, A.B.; Bédrin, C.

doi:10.1016/s0007-8506(07)62048-4

Cited by 3 publications

(1 citation statement)

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“…For optical micrography, samples were cut with a diamond grinding wheel, polished with abrasive paper, then with diamond paste and etched in the following reagent: 150 cm3 HCl, 25 g K2Cr3O7, 50 cm3 H2O. The residual stress fields were obtained by measuring the deformation resulting from the successive removal of thin layers [10,11]. This method so-called bending deflection method doesn't generate any stresses [12].…”

Section: Characterizationmentioning

confidence: 99%

Study of Powder Particle Size Effect on Microstructural and Geometrical Features of Laser Claddings Using Response Surface Methodology RSM

Boussaha

Aouici

Aouici³

et al. 2019

Acta Universitatis Sapientiae, Electrical and Mechanical Engineering

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A continuous CO2 laser (10.6 µm wavelength) was adopted to investigate the influence of powder particle sizes on microstructural and morphological characteristics of laser claddings. To study the potential of powder in controlling the incident laser energy, different average particle sizes of Ni-base powder were deposited on an austenitic stainless steel X3CrNi18-10 substrate. The energy value necessary to melt a mass m of powder was calculated. The results indicate that this energy decreases with particle sizes. The claddings obtained with small particle sizes revealed a good morphological aspect and a low dilution of the cladding layer in the substrate, yet enough to create a very good metallurgical bond. The residual stress state was also influenced. Concerning modeling, we have elaborated residual stress model in the case of laser cladding by exploiting the response surface methodology (RSM), using a quadratic regression model. Combined effects of three laser cladding parameters on the residual stress is explored by a statistical analysis of variance (ANOVA). Results show that the residual stress is influenced principally by the power delivered by laser beam and by the scanning speed. It is also indicated that the size of powder particle is the dominant factor affecting the residual stress.

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Section: Characterizationmentioning

confidence: 99%