Browsing by Author "Davut,K."
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Article Citation Count: 2Development and properties of austempered low alloyed white cast iron(Walter de Gruyter GmbH, 2021) Davut, Kemal; Davut,K.; Kilicli,V.; Department of Metallurgical and Materials EngineeringThis study examined the response of low-alloy white cast iron to austempering heat treatment. In addition, it investigated the microstructure and mechanical properties of austempered low-alloy white cast iron. The low-alloy white cast iron specimens were austenitized at 900 °C, followed by quick quenching into a salt bath at 375 °C, and held there for 15 to 120 minutes for austempering heat treatment. Microstructural features were studied by optical, scanning electron microscopes, and XRD analysis. The mechanical properties were determined by hardness and unnotched Charpy impact toughness tests. As a function of those austempering times, a microstructural map was constructed to show how the transformation products develop, quantitatively. The experimental results showed that the austempering heat treatment produced a microstructure consisting of eutectic carbides + ausferritic structure in low-alloy white cast iron. It can be concluded that the low-alloy white cast iron can be austempered, similar to ductile cast irons. Improved hardness and impact toughness values have been obtained in austempered low-alloy white cast iron. © 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany.Conference Object Citation Count: 0Effect of batch and continuous annealing processes on crystallographic texture and formability of an if steel(Association for Iron and Steel Technology, AISTECH, 2017) Davut, Kemal; Baskaya,U.; Davut,K.; Department of Metallurgical and Materials EngineeringIF (interstit ial free) steels are used in many applicatio ns, specifically in automotive industry due to their excellent formability. This formability behaviour is directly related to the annealing process, which influences both the crystallographic texture and the related "r value". For annealing, two main routes, namely batch and continuous annealing processes, are used in the production of IF-steels. The present study aims at comparing the same grade of IF steels produced via batch and continuous annealing processes. For this purpose, the texture and microstructure analysis were performed by electron backscatter diffraction (EBSD) technique in a scanning electron microscope (SEM). The formability behaviour of the steel sheet was characterized by determining the hardening curve and yield surface. It has been found that all samples show a strong ND fiber; {111}//ND. On the other hand, the drawability and related "r value" of continuously annealed samples were better than batch annealed ones. This behaviour is explained by the ultra-low carbon content, lower yield strength and equiaxial grain structure. © Copyright 2017 MS&T17®.