Publications by authors named "Marie Kvapilova"
Article Synopsis
- - The study focused on VT1-0 titanium processed through rolling at various temperatures, resulting in an ultrafine-grained microstructure with nanometer-sized grains.
- - Annealing at 823 K for 1 hour caused grain coarsening and subgrain formation, impacting the material's creep behavior under constant load tests conducted between 648-723 K.
- - Analysis revealed that titanium processed at elevated and room temperatures exhibited better creep strength than that processed at cryogenic temperatures, with post-SPD annealing negatively affecting creep properties.
Sheets of coarse-grained S304H austenitic steel were processed by high-pressure sliding (HPS) at room temperature and a ultrafine-grained microstructure with a mean grain size of about 0.14 µm was prepared. The microstructure changes and creep behavior of coarse-grained and HPS-processed steel were investigated at 500-700 °C under the application of different loads.
View Article and Find Full Text PDFMartensitic creep-resistant P92 steel was deformed by different methods of severe plastic deformation such as rotation swaging, high-pressure sliding, and high-pressure torsion at room temperature. These methods imposed significantly different equivalent plastic strains of about 1-30. It was found that rotation swaging led to formation of heterogeneous microstructures with elongated grains where low-angle grain boundaries predominated.
View Article and Find Full Text PDFThe effect of ultrafine-grained size on creep behaviour was investigated in P92 steel. Ultrafine-grained steel was prepared by one revolution of high-pressure torsion at room temperature. Creep tensile tests were performed at 873 K under the initially-applied stress range between 50 and 160 MPa.
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