NDLI: Methodology developed for modeling the fatigue crack growth behavior of single-crystal, nickel-base superalloys

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Methodology developed for modeling the fatigue crack growth behavior of single-crystal, nickel-base superalloys

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1996
Description	Because of their superior high-temperature properties, gas generator turbine airfoils made of single-crystal, nickel-base superalloys are fast becoming the standard equipment on today's advanced, high-performance aerospace engines. The increased temperature capabilities of these airfoils has allowed for a significant increase in the operating temperatures in turbine sections, resulting in superior propulsion performance and greater efficiencies. However, the previously developed methodologies for life-prediction models are based on experience with polycrystalline alloys and may not be applicable to single-crystal alloys under certain operating conditions. One of the main areas where behavior differences between single-crystal and polycrystalline alloys are readily apparent is subcritical fatigue crack growth (FCG). The NASA Lewis Research Center's work in this area enables accurate prediction of the subcritical fatigue crack growth behavior in single-crystal, nickel-based superalloys at elevated temperatures.
File Size	39047
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20050172087
Archival Resource Key	ark:/13960/t3b043840
Language	English
Publisher Date	1996-03-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Fatigue Tests Single Crystals Nickel Alloys Heat Resistant Alloys Fatigue Materials Failure Modes High Temperature Tests Crack Propagation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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