Repositorio UFRO · Omeka S

Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding

Primer Autor	Rojas, David
Co-autores	Onate, Angelo Torres, Enrique Olave, Diego Ramirez, Jesus Medina, Carlos Sanhueza, Juan Pablo Tuninetti, Victor Rojas, David
Título	Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding
Editorial	MDPI
Revista	CRYSTALS
Lenguaje	en
Resumen	The corrosion and mechanical response produced by quenching in the welded joint of a new Nb-doped stainless steel designed by the CALPHAD method and produced by open-atmosphere casting with recycled materials were investigated to contribute to the circular economy and to establish disruptive manufacturing criteria based on metallurgical principles. The steel was initially subjected to solubilization heat treatment and partial solubilization treatment at 1090 & DEG,C to obtain an appropriate a/? balance and carbide solubilization. It was then welded by the SMAW process, quenched, and tempered at three different cooling rates. As a result, a good fit between the phases predicted by the CALPHAD method and those observed by X-ray diffraction and scanning electron microscopy were obtained, with minor differences attributable to the precipitation and diffusion kinetics required for dissolution or nucleation and growth of the phases in the system. The forced air quenching mechanism was identified as providing an a/? phase equilibrium equivalent to 62/38 as the most effective quenching method for achieving the optimum mechanical and corrosion response, even with the post-weld s phase and showing superior results to those of the base metal. The outstanding mechanical and corrosion responses resulted from a proper balance of the primary phases in the duplex steel with a precipitation-strengthening mechanism. The damage tolerance obtained by forced air quenching was superior to that obtained by water and air quenching, with a PSE of 24.71 GPa% post-welding.
Fecha Publicación	2023
Tipo de Recurso	artículo original
doi	10.3390/cryst13081192
Formato Recurso	PDF
Palabras Claves	corrosion sigma phase super duplex stainless steel mechanical response
Ubicación del archivo	http://dx.doi.org/10.3390/cryst13081192
Categoría OCDE	Cristalografía Ciencia de los Materiales
Materias	corrosión fase sigma acero inoxidable súper dúplex respuesta mecánica
Identificador del recurso (Mandatado-único)	artículo original
Versión del recurso (Recomendado-único)	versión publicada
License	CC BY 4.0
Condición de la licencia (Recomendado-repetible)	CC BY 4.0
Derechos de acceso	acceso abierto
Access Rights	acceso abierto
Id de Web of Science	WOS:001057131700001
Tipo de ruta	verde# dorado
Categoría WOS	Cristalografía Ciencia de los Materiales
Referencia del Financiador (Mandatado si es aplicable-repetible)	UdeC 220.098.005-INV ANID-FONDECYT 1221600 ANID FONDECYT 1221600