Effect of alloy grain size and silicon content on the oxidation of austenitic Fe-Cr-Ni-Mn-Si alloys in pure O2

Autor:	Gregory J. Yurek, Soumendra N. Basu
Rok vydání:	1991
Předmět:	Austenite 6111 aluminium alloy Materials science Silicon Alloy Metallurgy Metals and Alloys Oxide chemistry.chemical_element engineering.material Microstructure Grain size Chromia Inorganic Chemistry chemistry.chemical_compound chemistry Materials Chemistry engineering
Zdroj:	Oxidation of Metals. 36:281-315
ISSN:	1573-4889 0030-770X
DOI:	10.1007/bf00662967
Popis:	Austenitic Fe-18Cr-20Ni-1.5Mn alloys containing 0, 0.6, and 1.5 wt.% Si were produced both by conventional and rapid solidification processing. The isothermal and cyclic oxidation resistance of the alloys were studied at 900°C in pure O2 to elucidate the role of alloy microstructure and Si content on oxidation properties. The conventionally-processed, large-grained alloy that contained no silicon formed Fe-rich nodules during oxidation. The nodule formation was effectively eliminated by either reducing the alloy grain size by rapid solidification or by adding Si to the alloy. The lowest weight gains were achieved when a continuous silica layer formed between the alloy and the external chromia scale. The formation of the continuous silica layer required a ombination of fine alloy grain size and high Si content. The presence of S in the alloy was found to be detrimental to oxide scale adherence when the silica layer was continuous.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c8c856977e3123efcba83e0795c0ee19 https://doi.org/10.1007/bf00662967 Zobrazit plný text záznamu Full text from SpringerLink