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Fatigue Crack Growth Rate Test Results for Al-Li 2195 Parent Metal, Variable Polarity Plasma Arc Welds and Friction Stir WeldsThe fatigue crack growth rate of aluminum-lithium (Al-Li) alloy 2195 plate and weldments was determined at 200-F, ambient temperature and -320-F. The effects of stress ratio (R), welding process, orientation and thickness were studied. Results are compared with plate data from the Space Shuttle Super Lightweight Tank (SLWT) allowables program. Data from the current series of tests, both plate and weldment, falls within the range of data generated during the SLWT allowables program.
Document ID
20000052923
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Hafley, Robert A. (NASA Langley Research Center Hampton, VA United States)
Wagner, John A. (NASA Langley Research Center Hampton, VA United States)
Domack, Marcia S. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
September 7, 2013
Publication Date
May 1, 2000
Subject Category
Metals And Metallic Materials
Report/Patent Number
L-17984
NASA/TM-2000-210098
NAS 1.15:210098
Funding Number(s)
PROJECT: RTOP 242-20-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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