Examinando por Materia "Entrada de calor"
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Publicación Acceso abierto Efectos de la entrada de calor durante el proceso de soldadura en la resistencia a la corrosión de aceros de alta resistencia y baja aleación(2020-11-05) Díaz Hernández, Carlos Mario; Díaz Cordero, Yerlis Patricia; Unfried Silgado, JimyIn this monograph was studied the effect caused in the microstructure and corrosion resistance by the heat input generated in the welding process in high strength and low alloy steels, a review which some samples of HSLA steels were welded or failing that, a heat treatment was applied in those was done in order to perform microscopy, lineal polarization, electrochemical impedance spectroscopy and some others corrosion techniques to study the electrochemical behaviour of the samples. According to results that different author have achieved was concluded that the corrosion resistance of weld joints depend on microstructural heterogeneity product of heat input in the weld process, so in conclusion, the corrosive attacks are highly possible to be concentrated in microstructures which has no homogeneity in its phases, usually the HAZ is zone who present the most microstructural variation in comparison with othersPublicación Acceso abierto Influencia de la entrada de calor por procesos de soldadura en la tenacidad y resistencia a la fractura de aceros de alta resistencia y baja aleación(2020-12-19) Naranjo Vásquez, Luis José; Ruíz Tenorio, Isabela; Silgado, Jimy UnfriedIn this monograph, the effect that the heat input generated by fusion welding processes in high-strength and low-alloy steels has been studied on the microstructure and on the fracture toughness and impact resistance. A bibliographic review including articles, research works and scientific reports was carried out where these steels were welded with different processes and / or the thermal cycles suffered by a welded joint were simulated through thermal treatments and software that recreated these conditions. Afterwards, by means of optical microscopy tests, scanning electron microscopy, hardness and microhardness tests, Charpy impact resistance tests and CTOD fracture toughness tests, among other techniques the steels were characterized and evaluated on the welded zones and sub-zones, in especially the heat affected zone of the base metal, where the greatest variation of microconstituents was concentrated. According to the results, it was determined that the toughness and the fracture behavior are subject to microstructural changes due to the heat input from the welding processes