Accession Number : AD0840349

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

Descriptive Note : Quarterly technical management rept. no. 5, 27 Mar-27 Jun 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 : 1968

Pagination or Media Count : 63

Abstract : The fracture toughness tests of all materials have been completed, and test results are reported. Axial-stress fatigue curves have been prepared for the 1/2 and 1-3/8-in. X7080-T7E41 plate, the 1/2-in. 7178-T651 plate, and the 11/16x16-in. 7075-T6510, 7075-T73510, X7080-T7E42 and 7178-T6510 extruded panels. The results of some stress-corrosion tests of the plates and extruded shapes are reported. The X7080-T7-type samples exhibit a higher resistance to stress-corrosion cracking than the 7178-T6-type samples. Tests to evaluate the stress-corrosion resistance of the extruded bar samples by a fracture mechanics approach have begun. Fatigue crack propagation curves have been prepared for the four samples of 7178 plate and extruded shapes. (Author)

Descriptors :   (*ALUMINUM ALLOYS, MECHANICAL PROPERTIES), (*CORROSION, ALUMINUM ALLOYS), EXTRUSION, PANELS, METAL PLATES, TOUGHNESS, FATIGUE(MECHANICS), STRESS CORROSION, FRACTURE(MECHANICS), CRACK PROPAGATION.

Subject Categories : Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE