Ductile cast irons: Microstructure influence on the fatigue initiation mechanismsdamage mechanicsfatiguenodular ironIn the last decades, the combination of high mechanical performances and low production costs increased the industrial interest on ductile cast irons. These grades are often used for ...
It is well known that the mechanical properties of ductile cast iron (DCI) depend on its microstructure, and that the microstructure depends on the properties of the melt and the cooling conditions during casting. There have been many studies of the individual elements of the process of casting...
porosity/ microstructurealloy elements effectaustempered ductile FehardnessDuctile cast iron has already demonstrated excellent mechanical properties. If given proper austempering, it can exhibit even more outstanding characteristics. The process of austempering for ductile cast iron is similar to steel, and ...
Ductile cast iron SiMo alloys Chemical composition Microstructure Mechanical properties 1. Introduction Ductile cast irons (DCIs) usually have graphite in the form of spherical nodules, and are thus often called nodular cast irons. Different DCI grades have been developed over the years and in specifi...
The main result of the investigation was that the initiation sight was at highly strained points in the microstructure. In this case the micro porosities dominated over the bigger and often degenerated graphite nodules as preferred initiation locations for fatigue cracks. During propagation, the ...
Optical microscopy, scanning electron microscopy and element probe microanalysis were used to investigate the microstructure at the cladding weld interface. The mechanical properties of the cladded specimens were evaluated after laser cladding. Our results revealed that the weldability of ductile cast iron ...
Using electrode as laser cladding materials, the microstructure and wear resistance of laser-clad layer of ductile cast iron was studied. The laser-clad layer can be subdivided into the melted zone where existed large amounts of austenite, graphite nodules and some carbide, and the solid state ...
doi:10.4236/jmmce.2014.21005Mohamed RamadanNaglaa FathyScientific ResearchJournal of Minerals & Materials Characterization & EngineeringFathy N (2013) Influence of semi-solid isothermal heat treatment on microstructure of gray cast iron. JMMCE 1: 326....
This goal was accomplished by applying a simple one-step spheroidization heat treatment to the as-cast ductile iron, which would normally possess a coarse pearlitic microstructure to a significant extent. Spheroidization experiments involving isothermal holding below the lower critical temperature (A1) ...
Then, an optical microscope (OM) and scanning electron microscope (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS) were used to examine the microstructure, fractography, nonmetallic inclusions, and failure cause. In addition, the nodularity of cast iron, which has an important role ...