SYMPOSIA PAPER Published: 01 January 1998

Improved Fatigue Resistance of 7050 Thick Plate Aluminum Through Minimization of Microporosity


This paper illustrates the substantial fatigue life improvements that have been achieved with 7050 heavy gauge plate over the past two decades. The load control fatigue resistance of 7050-T7451 thick plate is shown to decrease with increasing plate thickness at both the plate quarter-thickness (T/4) and mid-thickness (T/2). These reductions in fatigue resistance are shown to be most substantial at the plate mid-thickness, and they are shown to be directly related to the maximum size of remaining micropores.

Author Information

Deschapelles, JB
Century Aluminum Corporation, Ravenswood, West Virginia
Rice, RC
Structural Integrity Projects Office, Advanced Manufacturing Technology, Battelle, Columbus, Ohio
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Developed by Committee: E08
Pages: 34–71
DOI: 10.1520/STP12342S
ISBN-EB: 978-0-8031-5387-5
ISBN-13: 978-0-8031-2485-1