Co-optimization of wrought alumina-forming austenitic stainless steel composition ranges for high-temperature creep and oxidation/corrosion resistance

A seriesofcandidatealumina-formingaustenitic(AFA)stainlesssteelsdesignedtoevaluatetheeffectsof variationinAl,C,Cr,Mn,Nb,andNicontentonhigh-temperaturetensileproperties,creep,and oxidation/corrosionresistancewerestudied.ThecompositionsassessedwerebasedonmediumNi (20 25 wt%)andlowNi(12wt%)AFAvariation...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2014-01, Vol.590, p.101-115
Hauptverfasser:	BRADY, M. P, MAGEE, J, YAMAMOTO, Y, HELMICK, D, WANG, L
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Corrosion Corrosion mechanisms Corrosion prevention Creep Elasticity. Plasticity Exact sciences and technology Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy
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Zusammenfassung:	A seriesofcandidatealumina-formingaustenitic(AFA)stainlesssteelsdesignedtoevaluatetheeffectsof variationinAl,C,Cr,Mn,Nb,andNicontentonhigh-temperaturetensileproperties,creep,and oxidation/corrosionresistancewerestudied.ThecompositionsassessedwerebasedonmediumNi (20 25 wt%)andlowNi(12wt%)AFAvariationsstrengthenedprimarilybyMCand/orM23C6 carbide precipitates,andahighNi(32wt%)AFAsuperalloyvariationstrengthenedprimarilyby -Ni3Al intermetallic precipitates.Tensileandcreeppropertiesweremeasuredat650and750/760 1C, oxidation resistance from650to900 1C inairwithwatervaporandsteamenvironments,andsulfidation oxidation resistance inAr 20%H2 20%H2O 5% H2S at550and650 1C. Optimizedcompositionrangesfordifferent use temperaturesrangesbasedontheseevaluationsarepresented.
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2013.10.014