Underlying structure of bulky oxide nodule on alumina-forming austenitic stainless steel. (June 2015)

• Record Type: Journal Article
• Authors: Kang, Jun-Yun; Ha, Heon-Young; Jang, Min-Ho; Moon, Joonoh; Suh, Dong-Woo; Lee, Tae-Ho
• Is Part Of: Scripta materialia. Volume 102(2015)
• Page Start: 63
• Page End: 66
• Publication Date: 2015-06
• Subjects: Stainless steel -- Oxidation -- Electron backscattering diffraction (EBSD) -- Energy dispersive X-ray spectroscopy (EDXS) -- Phase identification; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.02.014
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The bulky oxide nodule and its underlying structure were investigated in an alumina-forming austenitic steel exposed to dry air at 1053 K for 336 h. Some bulky oxide nodules were found to be attached on globular phases in the matrix. By combined application of electron backscattering diffraction and energy dispersive X-ray spectroscopy, the bulky nodule was identified as Cr-rich M3 O4 underlying which was Nb-rich MO2 . Thermodynamic calculation suggested that the MO2 was transformed from the primary NbC near surface.