Accession Number : AD0738450

Title :   Mechanism of Fatigue Enhancement in Selected High Strength Aluminum Alloys.

Descriptive Note : Progress rept.,

Corporate Author : NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AERO MATERIALS DEPT

Personal Author(s) : Trabocco,Ronald E.

Report Date : 10 DEC 1971

Pagination or Media Count : 42

Abstract : The initial phase of an investigation concerned with the mechanism of fatigue enhancement in selected high strength/weight aluminum alloys was completed. Data indicates that in both X7080-T7 and X 7050, aluminum alloys fatigue enhancement is related to unique microstructures. In the case of the X7080 Al alloy it is the presence of aligned light etching regions and in the X 7050 alloy, it is the directional proliferation of precipitates predominately at grain boundaries. (Author)

Descriptors :   (*ALUMINUM ALLOYS, FATIGUE(MECHANICS)), MICROSTRUCTURE, FRACTURE(MECHANICS), AIRFRAMES

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE