PSI - Issue 42

8

Author name / Structural Integrity Procedia 00 (2019) 000–000

Petr Dymáček et al. / Procedia Structural Integrity 42 (2022) 1576–1583

1583

4. Conclusions Presented FeAlOY ODS nanocomposite contains 5-10x higher oxides volume fraction than currently known ODS alloys. Additional metallic Y is able to compensate the oxygen in the powder to enforce precipitation of the most stable Y 2 O 3 , positively influence the secondary recrystallization (coarser grain microstructure) and significantly improve the strength at 1100-1300 °C. The results have shown:  Excellent long-term oxidation resistance up to 1300 °C  Excellent long-term stability of strengthening nanodispersoid up to 1300 °C  Excellent long-term creep resistance at 1100-1300 °C  Top strength at 1100-1300 °C  Nearly no primary creep and very low creep rate under 10 -9 s -1 at 1100-1300 °C  Good machinability in secondary recrystallized state  Good hot formability in nanocrystalline state after hot consolidation is expected  Production of bars up to 50 mm in diameter and sheets up to 100 mm in width should be feasible Acknowledgements The authors gratefully acknowledge the support of the Czech Science Foundation project no. 21-02203X. References Bártková, D., Šmíd, M., Mašek, B., Svoboda, J., Šiška F., 2017. Kinetic study of static recrystallization in an Fe–Al–O ultra-fine-grained nanocomposite, Philosophical Magazine Letters 97, 379-385. Dymáček, P., Bártková, D., Horník, V., Stratil, L., Mašek, B., Svoboda, J., 2019. New generation of ODS steels, Key Engineering Materials 810, 113–118. Dymáček, P., Svoboda, J., Jirková, H., Stratil, L., Horník, V., 2019. Microstructure evolution and creep strength of new-generation oxide dispersion strengthened alloys with high volume fraction of nano-oxides, Procedia Structural Integrity 17, 427–433. Hadraba H., Kazimierzak, B., Stratil, L., Dlouhý, I., 2011. Microstructure and impact properties of ferritic ODS ODM401 (14%Cr-ODS of MA957 type), J. Nucl. Mater. 417, 241-244. Holzer, J., Gamanov, Š., Luptáková, N., Dlouhý, A., Svoboda, J., 2022. Coarsening Kinetics of Y 2 O 3 Dispersoid in New Grade of Fe-Al-Cr Based ODS Alloy, Metals 12, 210. Chlupová, A., Šulák, I., Kunčická, L., Kocich, R., Svoboda, J., 2021. Microstructural aspects of new grade ODS alloy consolidated by rotary swaging, Mater. Charact. 181, 111477. Khalaj, O., Mašek, B., Jirková, H., Bublíková, D., Svoboda, J., 2017. Influence of thermomechanical treatment on the grain-growth behaviour of new Fe-Al based alloys with fine Al2O3 precipitates, Materiali in Tehnologije 51, 759–768. Lindau, R., Moslang, A., Rieth, M., Klimiankou, M., Materna-Morris, E., Alamo A., A.-A. Tavassoli, F., Cayron, C., Lancha, A.-M., Fernandez P., Baluc, N., Schaublin, R., Diegele, E., Filacchioni, G., Rensman, J.W., Schaaf, B.v.d., Lucon, E., Dietz, W., 2005. Present development status of EUROFER and ODS-EUROFER for application in blanket concepts, Fusion Engineering and Design 75–79, 989–996. Mašek, B., Khalaj, O., Nový, Z., Kubina, T., Jirková, H., Svoboda, J., Štádler, C., 2016. Behaviour of new ODS alloys under single and multiple deformation, Materiali in Tehnologije 50, 891–898. Stratil, L., Horník, V., Dymáček, P., Roupcová, P., Svoboda, J., 2020. The Influence of Aluminum Content on Oxidation Resistance of New Generation ODS Alloy at 1200°C, Metals 10, 1478. Svoboda, J. Horník, V. Stratil, L. Hadraba, H. Mašek, B. Khalaj, O. Jirková, H., 2018. Microstructure Evolution in ODS Alloys with a High Volume Fraction of Nano Oxides, Metals 8, 1079. Svoboda, J., Kunčická, L., Luptáková, N., Weiser, A., Dymáček, P., 2020. Fundamental Improvement of Creep Resistance of New-Generation Nano-Oxide Strengthened Alloys via Hot Rotary Swaging Consolidation, Materials 18, 5217. Svoboda, J., Luptáková, N., Jarý, M., Dymáček, P., 2020. Influence of Hot Consolidation Conditions and Cr-Alloying on Microstructure and Creep in New-Generation ODS Alloy at 1100 °C, Materials 13, 5070. Svoboda, J., Bořil, P., Holzer, J., Luptáková, N., Jarý, M., Mašek, B., Dymáček, P., 2022. Substantial Improvement of High Temperature Strength of New-Generation Nano-Oxide-Strengthened Alloys by Addition of Metallic Yttrium, Materials 15, 504.