Development of microstructure and properties within oxide dispersion strengthened steel directly consolidated by hot rotary swaging

0577266 - ÚFM 2024 RIV NL eng J - Journal Article
Kocich, R. - Kunčická, Lenka - Benc, M.
Development of microstructure and properties within oxide dispersion strengthened steel directly consolidated by hot rotary swaging.
Materials Letters. Roč. 353, DEC (2023), č. článku 135276. ISSN 0167-577X. E-ISSN 1873-4979
R&D Projects: GA ČR GX21-02203X
Institutional support: RVO:68081723
Keywords : Rotary swaging * Direct consolidation * Oxide dispersion strengthening * Ferritic steel * Microstructure
OECD category: Materials engineering
Impact factor: 3, year: 2022
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0167577X23014611?via%3Dihub

Steels strengthened with fine oxides maintain favourable mechanical properties at high temperatures. This unique study evaluates the effects of direct consolidation of mechanically alloyed powders of ferritic steel and Y2O3 nanooxides by hot rotary swaging (multiple swaging ratios) on microstrutcures and mechancial properties of final rods. Direct consolidation of the steel powder by the proposed method was successful at the swaging ratio 1.0. However, the quality of consolidation improved with increasing the swaging ratio to 1.4, and finally to 1.8 (no visible pores). The microstructure of the rod processed with swaging ratio 1.8 exhibited homogeneous dispersion of oxide particles and featured ultra-fine (UF) grains, its average Vickers microhardness exceeded 700 HV1.
Permanent Link: https://hdl.handle.net/11104/0346487