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Evolución de la microestructura en aleaciones de acero inoxidable Fe-Cr preparadas por pulvimetalurgia

Authors: Armando Sarmiento Santos;

Evolución de la microestructura en aleaciones de acero inoxidable Fe-Cr preparadas por pulvimetalurgia

Abstract

Se estudia la influencia de los procesos utilizados durante las etapas de preparación de muestras por pulvimetalurgia, en algunas de las características de aleaciones inoxidables de Fe-Cr. Para ello se preparan muestras Fe-Cr con concentraciones de cromo entre 13,9 y 28,4 % en peso, se correlaciona el comportamiento de la variación de densidad de las muestras con su contenido de cromo y con los parámetros del proceso. Las muestras se someten a análisis elemental con la microsonda de rayos X acoplada al microscopio electrónico de barrido para corroborar los correspondientes contenidos de cromo. También fue observada la microestructura para las muestras con diferentes concentraciones de cromo. A partir de los análisis realizados se encontró una mayor densificación en las muestras con mayores contenidos de cromo, las cuales corresponden a una distribución de tamaño de partícula más ancha. Del estudio de la microestructura de las muestras, en función del contenido de cromo, se observa un mayor crecimiento de grano y menor porosidad en muestras con menor contenido de cromo.Palabras clave: pulvimetalurgia, aleaciones inoxidables, cromoAbstractThe influence of the processes used during the stages of sample preparation by powder metallurgy, in some of the characteristics of Fe-Cr stainless alloys, are studied. For this will prepared Fe-Cr samples with chromium concentrations between 13.9 and 28.4% by weight. The behavior of the density variation of samples with chromium content and process parameters were correlated. The samples were subjected to elemental analysis with X-ray microprobe coupled to a scanning electron microscope to confirm the relevant contents of chromium. Microstructure was also observed for samples with different chromium concentrations. From the analysis, we found a higher density in samples with higher chromium contents, which correspond to a wider particle size distribution. The study of samples microstructure, as a function of chromium content, reveals a higher grain growth and lower porosity in samples with lower chromium content. Keywords: powder metallurgy, stainless alloys, chromium

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold