Creep of N1-Al and Ni-Cr-Al Superalloy Foams

Heeman Choe*, David C Dunand

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The steady-state creep rate of Ni-base metallic foams, with superalloy composition (in wt. pet) Ni7.8̃9.1A1 (relative density, ρ* = 2.5-2.6) and Ni-13.5̃16.6Cr-5.1̃8.9Al (ρ* = 2.8̃3.0), was measured under a range of temperatures (680̃825°C) and applied stresses (0.1̃0.3 MPa), and compared with that of NiAl intermetallic foams (ρ = 5.3). The stress exponent and activation energy are within the expected range for bulk superalloys. At 825°C, Ni-Cr-Al foams display creep rates lower by ca. a factor 10 as compared to Ni-Al foams, and higher by ca. a factor 10 as compared to the NiAl intermetallic foams. These differences are discussed in terms of foam density and strut material creep resistance.

Original languageEnglish (US)
Title of host publicationAffordable Metal Matrix Composites for High Performance Applications II
EditorsA.B. Pandey, K.L. Kendig, J.J. Lewandowski, S.S. Shah
Pages35-41
Number of pages7
StatePublished - Dec 1 2003
EventMaterials Science and Technology 2003 Meeting - Chicago, IL, United States
Duration: Nov 9 2003Nov 12 2003

Publication series

NameMaterials Science and Technology 2003 Meeting

Other

OtherMaterials Science and Technology 2003 Meeting
CountryUnited States
CityChicago, IL
Period11/9/0311/12/03

Keywords

  • Creep
  • Metallic foams
  • Nickel
  • Pack Cementation
  • Superalloys

ASJC Scopus subject areas

  • Materials Science(all)

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  • Cite this

    Choe, H., & Dunand, D. C. (2003). Creep of N1-Al and Ni-Cr-Al Superalloy Foams. In A. B. Pandey, K. L. Kendig, J. J. Lewandowski, & S. S. Shah (Eds.), Affordable Metal Matrix Composites for High Performance Applications II (pp. 35-41). (Materials Science and Technology 2003 Meeting).