Cyclic plastic response of rotary swaged Fe-14Cr-10Al-4Y2O3 ODS alloy at 1000–1200 ◦C

0579090 - ÚFM 2025 RIV US eng J - Článek v odborném periodiku
Šulák, Ivo - Chlupová, Alice - Poloprudský, Jakub - Svoboda, Jiří
Cyclic plastic response of rotary swaged Fe-14Cr-10Al-4Y2O3 ODS alloy at 1000–1200 ◦C.
Materials Characterization. Roč. 207, JAN (2024), č. článku 113519. ISSN 1044-5803. E-ISSN 1873-4189
Grant CEP: GA ČR GX21-02203X
Institucionální podpora: RVO:68081723
Klíčová slova: ODS alloy * Mechanical alloying * Rotary swaging * Fatigue * Fractography * Microstructure
Obor OECD: Materials engineering
Impakt faktor: 4.7, rok: 2022
Způsob publikování: Omezený přístup
https://www.webofscience.com/wos/woscc/full-record/WOS:001135290700001

This study is dedicated to the investigation of the cyclic stress-strain response of a newly developed ferritic steel
reinforced with a high-volume fraction of oxide nanoparticles. The mechanically alloyed powder was consoli dated by hot rotary swaging into cylindrical rods with diameters of 15 mm and 12 mm. Subsequently, the rods
were annealed at 1200 ◦C for 4 h to achieve a fully recrystallized coarse-grained microstructure optimal for high temperature applications. The cyclic tests were carried out in controlled deformation mode in a symmetrical
push-pull cycle with triangular waveform at 1000 ◦C and 1200 ◦C in air. The Fe-14Cr-10Al-4Y2O3 ODS steel
exhibits extraordinary cyclic strength of up to 140 MPa at temperature of 1200 ◦C. The results show that rotary
swaging to a smaller diameter does not affect the resulting stress-strain response. The coarsening of the Y2O3
nanoparticles occurs only very slowly even at 1200 ◦C. In areas with significant plastic deformation, a slight
rotation of the coarse grains from the ideal [111] direction and partial dynamic recrystallization was observed.
Trvalý link: https://hdl.handle.net/11104/0349510