5 documents found, page 1 of 1
Plasticity Effects in the Hole-Drilling Residual Stress Measurement in Peened S...
Nobre, J. P.; Kornmeier, M.; Scholtes, B.
A utilização da difração de neutrões na determinação do perfil de tensões resid...
Marques, Maria José; Batista, A. C.; Nobre, J. P.; Loureiro, Altino; Kornmeier, Joana R.A técnica de difração de neutrões é usada neste artigo para estudar amostras ferríticas, revestidas com aços inoxidáveis austeníticos através de soldadura por arco submerso. Este procedimento é frequentemente usado no fabrico de equipamentos de processo para as indústrias química e nuclear, por facilidade de execução e razões económicas. A principal desvantagem deste processo de revestimento é a fissuração que ...
Evaluation of stress-strain behavior of surface treated steels by X-ray diffrac...
Coelho, Luís Manuel de Jesus; Batista, A. C.; Nobre, J. P.; Marques, M. J.X-ray diffraction assisted four-point bending method (XRDABM) enables to analyze the evolution of surface stress with the strain during bending of specimens. This experimental methodology was used to characterize the stressstrain behavior of two plasma nitriding steels, DIN 40 Cr Mn Mo 7 and DIN 32 Cr Mo V 13, with gradients of mechanical properties across the surface layers, allowing the characterization of th...
Residual stresses analysis of ND-YAG laser welded joints
Costa, J. M.; Pires, J. T. B.; Antunes, F.; Nobre, J. P.; Borrego, L. P.http://www.sciencedirect.com/science/article/B6V2X-4V3546Y-2/2/8ee5852dd432955cfe324f9228305af1
A study on elasto-plastic impact friction
Nobre, J. P.; Dias, A. M.; Gras, R.A purpose-built pendulum machine was used to study the oblique impact and the behaviour of the surface layers of a normalized low alloy steel subjected to the impact of hard [alpha]-alumina balls. The effect of relative tangential velocity on impulses, restitution coefficient and impact energy loss, was analysed. The morphology of the impact indentations was characterized and related to the impulses obtained. T...