NDLI: Literature survey on oxidations and fatigue lives at elevated temperatures

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Literature survey on oxidations and fatigue lives at elevated temperatures

Content Provider	NASA Technical Reports Server (NTRS)
Author	Liu, H. W. Oshida, Y.
Copyright Year	1984
Description	Nickel-base superalloys are the most complex and the most widely used for high temperature applications such as aircraft engine components. The desirable properties of nickel-base superalloys at high temperatures are tensile strength, thermomechanical fatigue resistance, low thermal expansion, as well as oxidation resistance. At elevated temperature, fatigue cracks are often initiated by grain boundary oxidation, and fatigue cracks often propagate along grain boundaries, where the oxidation rate is higher. Oxidation takes place at the interface between metal and gas. Properties of the metal substrate, the gaseous environment, as well as the oxides formed all interact to make the oxidation behavior of nickel-base superalloys extremely complicated. The important topics include general oxidation, selective oxidation, internal oxidation, grain boundary oxidation, multilayer oxide structure, accelerated oxidation under stress, stress-generation during oxidation, composition and substrate microstructural changes due to prolonged oxidation, fatigue crack initiation at oxidized grain boundaries and the oxidation accelerated fatigue crack propagation along grain boundaries.
File Size	1962382
Page Count	52
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840012606
Archival Resource Key	ark:/13960/t7gr1rf8t
Language	English
Publisher Date	1984-04-01
Access Restriction	Open
Subject Keyword	Metallic Materials Grain Boundaries Metal Fatigue Stress Analysis Nickel Alloys Heating Heat Resistant Alloys Oxidation Chemical Composition Crack Initiation 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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