SYMPOSIA PAPER Published: 01 January 1985

Effect of Temperature on the Fatigue and Fracture Properties of 7475-T761 Aluminum


The effect of low-temperature toughness degradation on damage tolerance and life analysis methodology is discussed. Spectrum fatigue and fatigue crack growth tests were conducted and life predictions made on 7475-T761 aluminum. The retardation behavior was determined by conducting constant K single overload fatigue crack growth tests. The low-temperature environment (−54°C[−65°F]) improved the life of fatigue and fatigue crack growth tests subjected to several loading spectra. This may be partially attributable to stronger retardation effects at low temperatures. It is concluded that low temperature may be a factor in damage tolerance and life analysis only under certain conditions.

Author Information

Cox, JM
Pettit, DE
Langenbeck, SL
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Developed by Committee: E08
Pages: 241–256
DOI: 10.1520/STP32759S
ISBN-EB: 978-0-8031-4924-3
ISBN-13: 978-0-8031-0411-2