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TEM study of the effect of high-temperature thermal cycles on the stability of the Y-Al-O oxides in MA956 ODS steel
Author(s) -
JERZY LEO,
Shanmukha Moturu,
Michael E. Fitzpatrick
Publication year - 2019
Publication title -
journal of materials research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.832
H-Index - 44
eISSN - 2214-0697
pISSN - 2238-7854
DOI - 10.1016/j.jmrt.2019.06.027
Subject(s) - materials science , oxide , transmission electron microscopy , thermal stability , dispersion (optics) , thermal , metallurgy , composite material , chemical engineering , nanotechnology , thermodynamics , physics , optics , engineering
MA956, a commercial ferritic grade of Oxide-Dispersion-Strengthened (ODS) steel, was investigated using transmission electron microscopy (TEM) to evaluate the influence of high-temperature thermal cycles on the nanometric dispersed oxides. Analyses of the oxide size distribution were carried out on foils from the as-received MA956 and following treatment at 1285 °C for one hour, and show that growth of the oxides has occurred under the thermal cycle. Implications for the oxide stability in the steel matrix are discussed, in the light of the oxide chemical composition.

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