المجلة الدولية للعلوم والتقنية

Constrained Groove Pressing (CGP) is an extreme plastic deformation method applied to increase the strength of metals. Restricted groove pressing is a process that causes both an increase in strength and an increase in hardness in metals. This study covers the existence of fine-grained structures and the change of mechanical properties in materials as a result of excessive plastic deformation of metallic materials together with the grooved press, which is limited by applying high pressing forces. After the process, hardness measurements of St 37 steel materials were made and an increase in strength and hardness values was observed. On other hand, in Scanning Electron Microscopy images (SEM), and Electron Backscatter Diffraction images (EBSD) which taken from the cross-section of the metals, the presence of severe plastic deformation, and consequently fine-grained structures was observed on the surface and just below the surface. St37 low carbon steel will be deformed by limited groove pressing, in different routes at room temperature and the effect of the amount of deformation will be tried to be measured. Deformed materials will be microstructurally examined using surface topography. In addition, mechanical properties and hardness changes in different parts of the material will be examined. The objective of this research is to clearly reveal the effect-relationships and correlations of the changes in the microstructural properties of the material on the improvement of the mechanical character of the limited groove pressing, which is applied as an extreme plastic deformation method. In the context of mechanical tests, the behaviour of St 37 low carbon steel material, which is plastically deformed under both single and cyclic loads, will be compared with the conventionally produced one and the results will be tried to be correlated with the microstructure properties.