NDLI: Fatigue behavior of a single-crystal superalloy

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Fatigue behavior of a single-crystal superalloy

Content Provider	NASA Technical Reports Server (NTRS)
Author	Kalluri, Sreeramesh McGaw, Michael A.
Copyright Year	1989
Description	A single-crystal superalloy, PWA 1480 is under consideration as a replacement material for the turbine blades of the high pressure fuel turbopump (HPFTP) of the space shuttle main engine (SSME). Three separate experimental programs were conducted to characterize the fatigue behavior of this alloy. Fatigue tests were conducted at room temperature (in air) and at 1000 F (in vacuum) on smooth specimens machined from both cast bars and slabs. The data from all of these programs are consolidated to provide a broader characterization of the fatigue behavior of the single crystal PWA 1480. The zero-mean-stress fatigue relationships are expressed in terms of stress range versus cyclic life lines on log-log plots. Characterization of the fatigue behavior of (001) oriented PWA 1480 single crystal under conditions of tensile mean stress was performed by using the unified approach proposed by Heidmann. In this approach the fatigue life is modified by a mean stress parameter so that a single life relationship can be used to represent both zero and tensile mean stress data.
File Size	230361
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910015000
Archival Resource Key	ark:/13960/t38100j51
Language	English
Publisher Date	1989-04-01
Access Restriction	Open
Subject Keyword	Metallic Materials Fatigue Tests Metal Fatigue Single Crystals Tensile Stress Turbine Pumps Stress-strain Relationships Turbine Blades Heat Resistant Alloys Space Shuttle Main Engine Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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