Accession Number : AD0286074

Title :   WING - ALUMINUM SHEET AND PLATE - DYNAMIC ETCHED OR CHEM-MILLED - MECHANICAL PROPERTIES - DETERMINATION OF

Corporate Author : GENERAL DYNAMICS/FORT WORTH TEX

Personal Author(s) : FARNER,H.B.

Report Date : 10 SEP 1962

Pagination or Media Count : 1

Abstract : The effect of chemical milling on mechanical properties of 2024, 7075, 7079 Al alloys was determined. The tensile strengths were affected as follows: All the 0.064 in. gage 2024-T86 alclad aluminum showed strength losses. Bare 1.50 in. gage 7075-T6 and 7079-T6 aluminum plate, showed strengths approximately 10% bel w the strength of the control specimens. There was no significant change in the mecahnical properties when the .125 in. thick alclad 2024-T86 was reduced to 0.098 in. thickness, the 0.312 in. thick 2024-T86 and 7075-T6 were reduced to 0.098 in. thickness, the 1-1/2 in. thick 7075-T6 was reduced to 0.030 in. thickness, or the 1-1/2 in. thick 7079-T6 in the longitu inal direction was reduced to 0.030 in. thickness. The 7079-T6 in the transverse directi n showed a loss in yield strength of about 10%. The 0.312 in. thick 2024-T86 plate reduce to 0.015 in. thickness, showed a loss of approximately 6% in yield and ultimate strengths in the transverse direction. Generally, all the materials showed some loss of ductility. (Author)

Descriptors :   *ALUMINUM ALLOYS, *CHEMICAL MILLING, FATIGUE (MECHANICS), MECHANICAL PROPERTIES, METAL PLATES, PROCESSING, SHEETS, SURFACES, TENSILE PROPERTIES, TEST METHODS, THICKNESS

Distribution Statement : APPROVED FOR PUBLIC RELEASE