Creep properties of heat-treated Fe-Al-O ODS alloy

0541995 - ÚFM 2022 RIV SK eng J - Journal Article
Fintová, Stanislava - Kuběna, Ivo - Jarý, Milan - Luptáková, Natália - Stratil, Luděk - Šiška, Filip - Svoboda, Jiří
Creep properties of heat-treated Fe-Al-O ODS alloy.
Kovové materiály. Roč. 59, č. 1 (2021), s. 39-50. ISSN 0023-432X. E-ISSN 1338-4252
R&D Projects: GA ČR(CZ) GA17-01641S; GA MŠMT(CZ) EF16_013/0001823; GA MŠMT(CZ) LQ1601
Institutional support: RVO:68081723
Keywords : creep * Electron backscattering diffraction (EBSD) * Mechanical alloying * Powder consolidation * Scanning electron microscopy (SEM)
OECD category: Materials engineering
Impact factor: 0.690, year: 2021
Method of publishing: Open access
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Three different heat treatment regimens were used to modify the microstructure of Fe-Al-O ODS alloy prepared via powder metallurgy. Creep testing at 60 % of alloy state proof stress revealed the highest time to fracture for the bimodal coarse-grained microstructure of the batch heat-treated at 1200°C for 24 h. Heat treatment at 1100 °C did not significantly influence the creep resistance of the alloy at 60 % of proof stress creep loading. However, the highest creep resistance was achieved by the strongest hindering of dislocations motion, which can be achieved by decreasing the grain size and increasing the density of dispersed particles, which was the case of the basic state material. Creep damage occurred in the specimens whole volume, and it was characterized by the growth and coalescence of intergranular cavities. © 2021 Institute of Materials and Machine Mechanics, Slovak Academy of Sciences. All rights reserved.
Permanent Link: http://hdl.handle.net/11104/0319744