Evaluación de la microestructura y microdureza de un material estructural astm a 36 obtenida por deformación plástica severa (sdp) en canal angular a sección constante (ECAP)

Abstract

The present work analyzed the behavior of a steel commonly used in the metal-mechanic industry when subjected to a deformation process. Initially, a research process was carried out on severe plastic deformation (SPD) and all the factors that comprise this phenomenon, within this method is the constant section angular channel deformation process. It was possible to replicate the latter in the materials resistance laboratory of the University District Francisco José de Caldas, technological faculty. Continuing with the experimental part of the project, cylindrical specimens of 11 mm in diameter with a length of 70 mm were designed and manufactured. Later they were taken through an AISI/SAE 1045 steel matrix arranged in the laboratory. It was necessary to count the number of passes to establish a change in grain size. At the end of this research document, it is possible to view detailed information regarding the average microhardness values in HR (RockWell Hardness) of the machined specimens with the geometry established before the Severe Plastic Deformation process and the microhardness values in HR (RockWell Hardness) of the specimens after each pass through the ECAP matrix. With the latter, a microhardness profile in HR (RockWell Hardness) was built, showing a collection of data through the entire length of the diameter of the specimens, the latter was applied sample by sample, since each one has a different geometry and amount of passed through the ECAP matrix. In addition, a microstructure was taken after each pass through the ECAP matrix of the specimens, with the final objective of analyzing and concluding how the Severe Plastic Deformation (SPD) process affects the microhardness and microstructure of a piece of A36 steel after being subjected pass by pass through the ECAP matrix.