نتایج جستجو برای: bainite transformation

تعداد نتایج: 221081  

2004
E. Keehan

Microstructure and properties have been studied for high strength steel weld metals with variations in carbon, manganese and nickel. Based on neural network modelling, experimental welds were made using shielded metal arc welding with manganese at 0.5 or 2.0 wt. % and nickel at 7 or 9 wt. %. Additional welds were made where carbon was varied between 0.03 and 0.11 wt. %. Generally there was very...

2011
M. J. Peet H. K. D. H. Bhadeshia

There is a novel steel invented in which the structure consists of extremely fine platelets of bainitic ferrite dispersed in a matrix of carbon enriched retained austenite. The resulting large density of interfaces makes the alloy very strong in its transformed condition. The authors report the first fatigue tests on this system, by measuring the life of parallel gauged samples tested using cyc...

2017
Thomas Sourmail Carlos Garcia-Mateo Francisca G. Caballero Lucia Morales-Rivas Rosalia Rementeria Matthias Kuntz Hugo F. Lopez

High silicon (>1.5%) steels with different compositions were isothermally transformed to bainite at 220 and 250 ◦C to produce what is often referred to as nanostructured bainite. Interrupted tensile tests were carried out and the retained austenite was measured as a function of strain. Results were correlated with tensile ductility. The role of retained austenite stability is remarkably underli...

Journal: :Journal of Materials Engineering and Performance 2022

Abstract A combination of physical simulation and laboratory rolling experiments, including thermomechanical low-temperature ausforming, was conducted for designing a suitable processing route to enable phase transformation from austenite ultrafine bainite in medium-carbon steel. Following ausforming at 500-550 °C, two different cooling holding paths were tried the study: (1) water close marten...

Journal: :Manufacturing Technology 2022

Incomplete bainitic transformation during austempering treatment is mainly caused by the supersatu-ration of austenite with carbon. Such supersaturated becomes more stable and further stabi-lization led silicon alloying. Stable does not transform remains in structure as so-called residual austenite. Therefore, carbides, which are desirable a conventional struc-ture, cannot be formed carbide fre...

Journal: :Journal of Thermal Analysis and Calorimetry 2022

Abstract This work presents insights into the manganese influence on driving force and bainite transformation kinetics. Three different medium-Mn steels were subjected to theoretical calculations dilatometric study in order determine Mn impact formation. The approach shows that increase of leads a lower fraction formed during isothermal stage. implicates carbon enrichment austenite thermal trea...

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