Modeling study of cyclic oxidation behavior of NiAl and NiCr alloys

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DOIResolve DOI: http://doi.org/10.1007/s11665-014-1238-7
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TypeArticle
Journal titleJournal of Materials Engineering and Performance
ISSN1059-9495
Volume23
Issue12
Pages43664373; # of pages: 8
SubjectOxidation; Superalloys; Cyclic oxidation behavior; Cyclic oxidation tests; Determination of model parameters; Experimental curves; Micromechanics-based modeling; Model and simulation; Oxidation behaviors; Protective layers; Alloys
AbstractThe cyclic oxidation behavior of four high-temperature alloys (two NiAl alloys and two NiCr alloy) is studied utilizing an existing micromechanics-based model, in which Al2O3 and Cr2O3 are formed on the alloys as protective layers. For each alloy, the model parameters are determined based on one ‘complete’ experimental curve of weight change, which is obtained under a high-temperature cyclic oxidation test where the weight change experiences a maximum value and then drops down to a zero point. The model is first tested on two metals which have experimental data available for comparison. It is found that the model parameter, oxide crack density exponent, can be assumed constant within a range of high temperature for each metal, thus with the ‘complete’ experimental curve of weight change, the model can predict the oxidation behavior of the metal at different temperatures. The determination of model parameters, accuracy, and limitations of the model for NiAl and NiCr alloys is analyzed and discussed.
Publication date
PublisherSpringer Science+Business Media
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace
Peer reviewedYes
NPARC number21275498
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Record identifier60154c95-5aa3-4b36-b196-81dd734d667e
Record created2015-07-14
Record modified2016-05-09
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