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X-ray diffraction characterization of ion-implanted austenitic stainless steel
Marques, M. J.; Pina, J.; Dias, A. M.; Lebrun, J. L.; Feugeas, J.The effect of ion implantation surface treatment in an austenitic stainless steel, AISI 304, with nitrogen and argon ions is presented in this work. The study concerns phase analysis, crystallographic texture, and in depth residual stress profile characterization by X-ray diffraction. In order to determine the residual stress depth profiles, a combination of the conventional X-ray diffraction technique, with se...
Study by X-ray diffraction and mechanical analysis of the residual stress gener...
Pina, J.; Dias, A.; Lebrun, J. L.Thermally sprayed coatings are formed by the deposition of molten or partially molten particles, propelled onto a substrate where they impact, spread and solidify rapidly. Residual stresses are expected within the sprayed deposit as a consequence of the release of thermal and kinetic energies. A wide range of materials and two spraying techniques are considered in this study, namely atmospheric plasma spraying ...
A methodology development for the study of near surface stress gradients
Marques, M. J.; Dias, A. M.; Gergaud, P.; Lebrun, J. L.A modification of the geometry used in the sin2 [psi] technique of X-ray diffraction is described. A modified equation for residual stress determination, including geometric adapted Fij, is presented. This method allows near surface stress gradients determination and is called pseudo-grazing incidence method. The limits of the new technique were first tested on different powder materials with X-ray radiation pr...
Residual stress analysis in orthogonal machining of standard and resulfurized A...
M'Saoubi, R.; Outeiro, J. C.; Changeux, B.; Lebrun, J. L.; Morão Dias, A.Residual stresses induced by orthogonal cutting in AISI 316L standard and resulfurized steels have been investigated, with attention given to the role played by the cutting parameters, such as cutting speed, feed rate, tool geometry and tool coating. Depth profiles of residual stress have been determined using the X-ray diffraction technique. The effect of cutting conditions and tool nature on residual stresses...
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