Resumen-Las energía elasto-plásticas y el parámetro RID (Relative Indentation Depth: cociente entre la máxima profundidad de indentación y el espesor del recubrimiento, = hmax/t) se utilizaron para evaluar la capacidad de soportar carga de materiales con recubrimientos cerámicos. El estudio se realizó en sistemas sustrato-recubrimiento de TiN con espesores de 2 m y 3 m depositados por PAPVD sobre acero M2 y sobre acero inoxidable 304L. Se analizaron gráficos de dureza vs. y Wp/Wt vs. . Se encontraron correlaciones para diferentes profundidades de indentación a las que se da la transición entre la respuesta mecánica del recubrimiento y la respuesta mecánica del sistema sustrato-recubrimiento; y en los puntos donde la eficiencia de usar el recubrimiento cae al 33 y al 50%. Se demostró que puede obtenerse información importante a partir de los datos de energía sobre la respuesta mecánica de un sistema sustrato-recubrimiento, sin necesidad de recurrid al método de Oliver y Pharr para medir la dureza y el módulo de elasticidad. Palabras clave-Energía de indentación, profundidad de indentación relativa (RID), recubrimientos duros.Abstract-The elasto-plastic energies and the RID parameter (Relative Indentation Depth =hmax/t), defined as the ratio between the maximum indentation depth and the coating thickness, were used to evaluate the ability of the ceramic coated systems to withstand load. The study was conducted on M2 and 304L steels coated with titanium nitride by PAPVD. Both substrates were coated with TiN of about 2,0 and 3,0 µm thickness. The hardness vs. () and the ratio of plastic to total energy (Wp/Wt) vs. () graphs were analyzed. There were found correlations between the indentation depths at which the transition from mechanical response due to the coating to the mechanical response of substrate-coating and to substrate dominated behavior and the depths at which the efficiency of using the coating falls 33% and 50 %. Results show that it is possible to get useful information from the energy taken from the mechanical response of the coated systems to avoid the Oliver and Pharr method for measuring the hardness and elastic modulus.
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