Institute of Physics of Materials AS CR, v. v. i. > Projects > Beyond properties of current top performance alloys

Beyond properties of current top performance alloys

InvestigatorRNDr. Jiří Svoboda, CSc., DSc.
Number of Project21-02203X
AgencyGrantová agentura České republiky
Duration2021-01-01 - 2025-12-31

Anotace
Current top performance alloys still show a considerable potential to improve their properties. The project deals with two kinds of materials: (i) new-designed low alloyed martensitic steels with the goal to increase their ductility at room temperature while keeping their top strength and (ii) new-generation oxide dispersion strengthened (ODS) Fe-Al based alloys with the goal to increase their creep strength at 1100-1300 °C by tuning the grain morphology. The increase in ductility of the martensitic steels with a special chemical composition should be achieved by controlled heat treatment which allows tuning the morphology of strengthening C-based nanoclusters in martensite. Such a nanostructure can effectively block dislocation motion and activate deformation in nano-twining modes without formation of stress concentration initiating the fracture process. The optimal grain morphology of new-generation ODS alloys will be achieved by hot consolidation of ODS powders by rotary swaging (this method has never been used before) followed by annealing to provoke secondary recrystallization.

2023

Khalaj O., Jamshidi M., Hassas P., Mašek B., Štádler C., Svoboda J.: Digital twinning of a magnetic forging holder to enhance productivity for industry 4.0 and metaverse. Processes 11 (2023) 1703

Khalaj O., Jamshidi M., Hassas P., Hosseininezhad M., Mašek B., Štádler C., Svoboda J.: Metaverse and AI digital twinning of 42SiCr steel alloys. Mathematics 11 (2023) 4

Svoboda J., Kocich R., Gamanov Š., Kunčická L., Luptáková N., Dymáček P.: Processing window for hot consolidation by rolling and rotary swaging of Fe-10Al-4Cr-4Y2O3 ODS nanocomposite. Materials Today Communications 34 (2023) 105393

Gamanov Š., Luptáková N., Bořil P., Jarý M., Mašek B., Dymáček P., Svoboda J.: Mechanisms of plastic deformation and fracture in coarse grained Fe-10Al-4Cr-4Y2O3 ODS nanocomposite at 20-1300°C. Journal of Materials Research and Technology 24 (2023) 4863-4874


2022

Gamanov Š., Holzer J., Roupcová P., Svoboda J.: High temperature oxidation kinetics of Fe 10Al 4Cr 4Y2O3 ODS alloy at 1200 1400 C. Corros. Sci. 206 (2022) 110498

Svoboda J., Gamanov Š., Bártková D., Luptáková N., Bořil P., Jarý M., Mašek B., Holzer J., Dymáček P.: The Optimization of Mechanical Alloying Conditions of Powder for the Preparation of a Fe-10Al-4Cr-4Y2O3 ODS Nanocoposite. Materials 15 (2022) 9034

Svoboda J., Bořil P., Holzer J., Luptáková N., Jarý M., Mašek B., Dymáček P.: Substantial Improvement of High Temperature Strength of New-Generation Nano-Oxide-Strengthened Alloys by Addition of Metallic Yttrium. Materials 15 (2022) 15020504

Svoboda J., Zickler G., Kozeschnik E., Fischer F.: Generalization of classical Hillert's grain growth and LSW theories to a wide family of kinetic evolution equations and stationary distribution functions. Acta Mater. 235 (2022) 118085

Khalaj O., Saebnoori E., Mašek B., Štádler C., Hassas P., Svoboda J.: The Influence of Cooling Rate between Ms and Mf on the Mechanical Properties of Low Alloy 42SiCr Steel Treated by the Q-P Process. Metals 12 (2022) 2081

Dymáček P., Kocich R., Kunčická L., Jarý M., Luptáková N., Holzer J., Mašek B., Svoboda J.: Processing of top creep and oxidation resistant Fe-Al based ODS alloys. Procedia Struct. Integr. 42 (2022) 1576-1583

Holzer J., Gamanov Š., Luptáková N., Dlouhý A., Svoboda J.: Coarsening Kinetics of Y2O3 Dispersoid in New Grade of Fe-Al-Cr-Based ODS Alloy. Metals 12 (2022) 12020210


2021

Chlupová A., Šulák I., Kunčická L., Kocich R., Svoboda J.: Microstructural aspects of new grade ODS alloy consolidated by rotary swaging. Mater. Character. 181 (2021) 111477

Khalaj O., Jamshidi M., Saebnoori E., Mašek B., Štádler C., Svoboda J.: Hybrid Machine Learning Techniques and Computational Mechanics: Estimating the Dynamic Behavior of Oxide Precipitation Hardened Steel. IEEE ACCESS 9 (2021) 156930-156946

Khalaj O., Ghobadi M., Saebnoori E., Zarezadeh A., Shishesaz M., Mašek B., Štádler C., Svoboda J.: Development of Machine Learning Models to Evaluate the Toughness of OPH Alloys. Materials 14 (2021) 6713