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Title: 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%)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.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [3]
  1. ORNL
  2. Carpenter Technology Corporation
  3. University of Tennessee, Knoxville (UTK)
Publication Date:
OSTI Identifier:
1098184
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Science and Engineering A; Journal Volume: 590
Research Org:
Oak Ridge National Laboratory (ORNL)
Sponsoring Org:
EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
Country of Publication:
United States
Language:
English