SYMPOSIA PAPER Published: 01 January 1985

Low Temperature and Loading Frequency Effects on Crack Growth and Fracture Toughness of 2024 and 7475 Aluminum


An experimental program was conducted to investigate the effect of low temperature (219 K [−65°F]) on the crack growth and fracture toughness of two aluminum alloys, 2024-T351 and 7475-T7651. Crack growth tests were performed with center-cracked panels and constant-amplitude and spectrum loadings. The spectrum represented a transport wing lower surface. The results show the 2024 alloy properties at low temperature to be equal to or better than the properties of that alloy at room temperature (RT), whereas some of the 7475 alloy properties decreased. In addition, tests were performed at RT and low temperature on 2024-T3 to evaluate the effect of loading frequency on crack growth. The results indicated a faster crack growth rate at lower frequencies.

Author Information

Abelkis, PR
Harmon, MB
Hayman, EL
Mackay, TL
Orlando, J
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: E08
Pages: 257–273
DOI: 10.1520/STP32760S
ISBN-EB: 978-0-8031-4924-3
ISBN-13: 978-0-8031-0411-2