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:

1968-01-01

Pagination or Media Count:

63.0

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 12 and 1-38-in. X7080-T7E41 plate, the 12-in. 7178-T651 plate, and the 1116x16-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