Hardness Prediction in Quenched and Tempered Nodular Cast Iron Using the Hollomon-Jaffe Parameter

Adiabatic Shear in annealed and shock - hardened iron and in quenched and tempered 4340 steel

Adiabatic shear localization is a catastrophic failure mechanism which can occur in ductile metals under high strain rate loading. This mechanism is driven by a thermal instability process in which rapid temperature rise due to plastic work couples with thermal softening to cause uniform deformation to collapse into narrow bands of intense shear within which material ductility is exhausted. Adi...

Adiabatic Shear in Remco Iron and Quenched and Tempered 4340 Steel

Adiabatic shear localization is studied in two ferrous metals, Remco Iron, a high purity alpha iron, and 4340 steel, quenched and tempered at 650°C. Punching-shear experiments are performed in a compressive split-Hopkinson bar producing shear strain rates of 45,000 s-'. Optical and scanning electron microscopy was performed on the deformed shear specimens to determine the extent of shear locali...

Investigation of Wear Mechanism in Quenched and Tempered Medium Carbon-High Chromium Martensitic Steel Using Dry Sand/Rubber Wheel

The aim of the present study was to investigate the effect of quenching and tempering temperatures on the microstructure, mechanical properties and the wear characteristics of medium carbon-high chromium wear resistant steel. In addition, the dominant wear mechanisms were studied. For this purpose, austenitizing and tempering temperatures were selected in the ranges of 900- 1000 °C and 300- 500...

Failure Analysis of a Four Cylinder Diesel Engine Crankshaft Made From Nodular Cast Iron

The premature breakage in some four cylinder diesel engine crankshafts was reported. All crankshafts were failed from the same region. Failures had occurred in the first crankpin, the nearest crankpin to the flywheel. Dynamic analysis and finite element modelling were carried out to determine the state of stress in the crankshaft. FEM results revealed that the first crankpin fillet is the most ...

The Microsegregation Pattern of Aluminum and Silicon in the Matrix Microstructure of the Nodular Cast Irons