In this work we propose a novel automatic cast iron segmentation approach based on the Optimum-Path Forest classifier (OPF). Microscopic images from nodular, gray and malleable cast irons are segmented using OPF, and Support Vector Machines (SVM) with Radial Basis Function and SVM without kernel mapping. Results show accurate and fast segmented images, in which OPF outperformed SVMs. Our work i...

Abstract This work focused on producing and characterizing high silicon cast irons (microstructural analysis, tensile properties, damping capacity, elastic properties). Moreover, it also evaluated the influence of RE alloying capacity. The samples present a step-casting geometry to verify cooling rate’s impact their microstructures and, consequently, mechanical properties. Si SGI presented full...

The addition of magnesium alloy elements followed by a flame-hardening process will change the phase configuration in gray cast iron. This study aims to investigate changes microstructure and hardness due these two processes. is conducted adding FeSiMg as carrier for magnesium. Metallographic examination observe was carried out using Scanning Electron Microscope (SEM) Energy-Dispersive X-ray Sp...

There is an amazing array of concretions throughout the sedimentary record Earth, and now iron oxide examples (“blueberries”) recognized in several regions Mars. Two questions address current state knowledge on nodular cemented mineral masses as well coloration patterns. Collectively authigenic cements patterns chronicle past diagenetic conditions, particularly clastic rocks.

Master moulds are used to cast copper anode moulds. These iron moulds are made of grey or nodular cast irons. According to desirable properties of ductile irons, it was expected that ductile cast iron ...