On the low cycle fatigue deformation of Haynes 188 superalloy in the dynamic strain aging regime
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
A solid solution strengthened wrought cobalt-base superalloy, Haynes 188, which exhibits an excellent combination of high temperature strength, oxidation resistance and tensile ductility is currently used for a variety of components in gas turbine engines. This alloy is particularly effective for long-term applications at temperatures to {approx} 650 C. Although the temperature ranges of its applications encompasses the domain in which dynamic strain aging (DSA) is active, to date there has been little to no information available on the effects of DSA on cyclic deformation and accompanying substructure. The purpose of this paper is to report some recent observations pertaining to the temperature dependence of cyclic stress response and evolving deformation substructure of Haynes 188 between 25 and 1,000 C. Given that this alloy exhibits planar slip and stacking fault fringes and ribbons in the DSA domain, an attempt has been made to discuss the origin of planar slip in this alloy.
- OSTI ID:
- 237863
- Journal Information:
- Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 6 Vol. 33; ISSN 0956-716X; ISSN SCRMEX
- Country of Publication:
- United States
- Language:
- English
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