Πλοήγηση ανά Συγγραφέα "Katsamas, A. I."
Αποτελέσματα 1-12 από 12
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A computational study of austenite formation kinetics in rapidly heated steels
(2007)Surface hardening of steels involves rapid austenitization and subsequent quenching of the surface. The resulting extent of hardening largely depends on the rate of austenitization of the surface under the applied high ... -
Laser-beam carburizing of low-alloy steels
(2001)The present study investigated the use of a laser-beam, in order to carburize the surface of DIN 15CrNi6 low-alloy, case-hardening steel. The surface of the material was coated with graphite prior to laser irradiation. Two ... -
Laser-beam surface transformation hardening of hypoeutectoid Ck-60 steel
(1997)A carbon dioxide laser with a power of 1.5 KW was employed for surface hardening of a hypoeutectoid Ck-60 steel. The microstructures and hardness profiles were determined as a function of power density and laser beam travel ... -
A method for the calculation of retained austenite evolution during heat-treatment of low-alloy TRIP-assisted steels
(2006)Despite the critical effect of heat-treatment, and in particular of the isothermal bainitic treatment stage, on the amount and stability of retained austenite in the microstructure of low-alloy TRIP-assisted steels, ... -
Modelling of transformations in TRIP steels
(2004)Industrial processing of low-alloy Transformation Induced Plasticity (TRIP) steels involves various stages of heat-treating, such as Intercritical Annealing (IA) and Bainitic Isothermal Treatment (BIT), in order to produce ... -
Multiscaling effects in low alloy TRIP steels
(2007)Low-alloy TRIP steels are a new class of steels with excellent combinations of strength and formability, which offer a unique field for the study of multiscale effects in materials, in the sense that experimental observations ... -
A Semi-Empirical Model for the evolution of Retained Austenite via Bainitic Transformation in Multiphase TRIP Steels
(2008)Multiphase TRIP steels exhibit unique combinations of strength and cold formability, characteristics especially desirable in automotive applications. This behaviour is largely determined by the amount and stability of the ... -
Simulation of intercritical annealing in low-alloy TRIP steels
(2000)A coupled thermodynamic/kinetic calculation of austenite formation during intercritical annealing of low-alloy TRIP steels is presented. The simulation was performed with the use of Dictra computational kinetics software, ... -
Stability and constitutive modelling in multiphase TRIP steels
(2006)Multiphase TRIP steels are a relatively new class of steels exhibiting excellent combinations of strength and cold formability, a fact that renders them particularly attractive for automotive applications. The present work ... -
Stress-corrosion cracking of a Monel 400 tube
(2004)A bent Ni-Cu Monel 400 alloy tube, which operated as part of a pipeline in a petrochemical distillery installation, failed by through-thickness cracking. The pipeline was used to carry a stream of gaseous hydrocarbons ... -
Surface hardening of low-alloy 15CrNi6 steel by CO2 laser beam
(1999)The study investigates laser transformation hardening in the low-alloy 15CrNi6 case-hardening steel. The effect of process parameters such as beam power, beam diameter and travel speed on microstructure, case depth and ... -
Thermodynamics-Based Computational Design of Al-Mg-Sc-Zr Alloys
(2010)Alloying additions of Sc and Zr raise the yield strength of Al-Mg alloys significantly. We have studied the effects of Sc and Zr on the grain refinement and recrystallization resistance of Al-Mg alloys with the aid of ...