The influence of the spatial distribution of the austenitic phase on the effective mechanical properties of a multiphase steel assisted by transformation-induced plasticity is analyzed using a numerical homogenization scheme. Representative three-dimensional volume elements with distinct microstructures are created applying a newly-developed algorithm based on the generation of a multilevel Vor...

In a steel-refining ladle, the properties of manufactured steel can be notably degraded due to presence excessive inclusions. Stirring via gas injection through porous plug is often used as part process reduce these this paper, 3D computational fluid dynamics (CFD) modeling analyze transient multiphase flow and inclusion removal in gas-stirred ladle. The effects stirring with bubble-inclusion i...

Low-voltage high resolution imaging in advanced field emission gun scanning electron microscopes (FEG-SEMs) is an essential technique in the characterisation of a broad range of materials – particularly for polymers and complex multiphase/multicomponent materials, that can experience significant charging effects during conventional 10 to 20 kV imaging. In particular, the analysis of corrosion s...

A computational approach to the optimization of fracture resistance of multiphase materials (here high speed steels) by varying their microstructure is presented. The main points of the optimization of steels are as folIows: (1) development and verification of the model: numerical simulation of crack initiation and growth in real microstructures of steels, (2) computational experiment: simulati...

In the production of critical parts for various machines and mechanisms, expensive structural steels are used alloyed with chromium, nickel, molybdenum, vanadium. practice, wear resistance parts, especially under severe operating conditions, may be insufficient due to uneven microstructure content retained austenite. Therefore, increasing operational stability products made alloy is an importan...

This work studies a series of factors influencing erosion-corrosion in oilfield gathering pipelines steel using the home-made testing pipe flow loop. Results showed that was corroded oil-water flow. The corrosion rate increased with velocity on whole, and addition solid particles would intensify localized corrosion. For test added 2 wt% quartz sand at m/s, portion pure erosion accounted for 47....

Improving wear resistance and reducing the coefficient of friction cylinder liner are critical to improving service life energy savings internal combustion engines. In this paper, effect characteristics cementite precipitation on tribological performance was studied using a medium carbon steel (AISI 1045 steel), which can be used make liners. Three kinds microstructures with different were obta...

The thermo-mechanical control processing (TMCP) of low carbon (C) Nb-Ti-containing HSLA steel with different cooling rates from 5 to 20 ◦C/s was simulated using a Gleeble 3500 system. The samples’ microstructure was characterized and the tensile properties measured. The results show that a microstructure mainly consisting of quasi-polygonal ferrite (QPF), granular bainitic ferrite (GBF), and ma...