Accession Number : AD0831744

Title :   FRACTURE TOUGHNESS, FATIGUE AND CORROSION CHARACTERISTICS OF HIGH STRENGTH ALUMINUM EXTRUSIONS AND PLATE.

Descriptive Note : Quarterly technical management rept. no. 4, 27 Dec 67-27 Mar 68,

Corporate Author : ALUMINUM CO OF AMERICA ALCOA CENTER PA ALCOA LABS

Personal Author(s) : Schilling, P. E. ; Lifka, B. W. ; Nordmark, G. E. ; Kaufman, J. G.

Report Date : 27 MAR 1968

Pagination or Media Count : 67

Abstract : The X7080 11/16x16-in. extruded panels and 3-1/2x7-1/2-in. extruded bars have been aged to the T7E42 temper, so that all test samples are now qualified. The chemical compositions and tensile properties of all test samples have been determined and are reported. The results of the accelerated exfoliation tests of the 1/2-in. and 1-3/8-in. X7080-T7E41 and 7178-T651 plate samples are reported, along with some stress-corrosion test results for these samples. Axial-stress fatigue curves and modified Goodman diagrams have been prepared for the 1-3/8-in. X7080-T7E41 and 7178-T651 plate, and for the 11/16x16-in. 7075-T6510, 7075-T73510, and 7178-T6510 extruded panels. Some fatigue crack propagation test results for the 1-3/8-in. X7080-T7E41 and 7178-T651 plate are also reported. (Author)

Descriptors :   (*ALUMINUM ALLOYS, MECHANICAL PROPERTIES), (*CORROSION, ALUMINUM ALLOYS), EXTRUSION, PANELS, RODS, METAL PLATES, TENSILE PROPERTIES, TOUGHNESS, FRACTURE(MECHANICS), FATIGUE(MECHANICS), STRESS CORROSION, CRACK PROPAGATION, HEAT TREATMENT, ACCELERATED TESTING, AGING(MATERIALS), AEROSPACE CRAFT.

Subject Categories : Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE