Processing and compressive creep of cast replicated IN792 Ni-base superalloy foams

John D. DeFouw*, David C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Nickel-base superalloy foams were created by a casting replication technique where a lightly sintered preform of SrF 2 was pressure infiltrated with molten IN792; after solidification of the composite, the salt phase was dissolved with HCl to create 65% open porosity. Room temperature yield strength and stiffness of the IN792 foam compared well with existing models. Monolithic and foam samples were tested under creep conditions at 750 and 850°C at stresses ranging from 5 to 40MPa for the foams and from 150 to 650MPa for the monolithic alloy. Both exhibited power-law creep behavior at high stresses and a transition to viscous flow at lower stresses, which was modeled using equations for dislocation and diffusional creep.

Original languageEnglish (US)
Pages (from-to)129-133
Number of pages5
JournalMaterials Science and Engineering A
Volume558
DOIs
StatePublished - Dec 15 2012

Keywords

  • Casting
  • Cellular materials
  • Mechanical characterization
  • Nickel based superalloys

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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