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Effects of Long‐Term Ageing at High Temperatures on Oxide Scale Development and Evolution of Austenitic Steels Microstructure
Author(s) -
Zieliński Adam,
Dudziak Tomasz Pawel,
Golański Grzegorz,
Gazdowicz Jarosław,
Kołodziej Anna
Publication year - 2020
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201900595
Subject(s) - materials science , microstructure , oxide , metallurgy , scanning electron microscope , austenite , homogeneous , austenitic stainless steel , brittleness , composite material , corrosion , physics , thermodynamics
This study is conducted to investigate the effects of long‐term air oxidation on the microstructural stability of HR3C, HR6W, and Sanicro 25 stainless steel. The materials are exposed to air atmosphere for 1000 and 10 000 h at 650, 700, and 750 °C respectively. The postexposed materials indicate some microstructural changes: the HR3C stainless steel develops Fe–Cr‐rich oxide scale, whereas HR6W steel forms a brittle, low adherent oxide scale consisting different concentrations of Cr, Mn, Fe, and Ni. Finally, Sanicro 25 stainless steel promotes the formation of a homogeneous‐rich Cr oxide scale at high temperatures. The analyses are performed using scanning electron microscopy (SEM)/energy‐dispersive X‐ray spectrometry (EDS) and X‐ray mappings.