Accession Number : AD0283218

Title :   CRACK PROPAGATION TESTS OF CHEMICALLY MILLED TI-6A1-4V TITANIUM ALLOY AT -65F

Corporate Author : NORTH AMERICAN AVIATION INC LOS ANGELES CA

Personal Author(s) : KONO, K.

Report Date : 27 NOV 1961

Pagination or Media Count : 1

Abstract : The crack propagation test is designed to investigate the effect of a stress raiser in sheet material under cyclic tensile loads. Its purpose is to simulate the effect of an undetected crack in fuselage, wing, or control surface skin under fatigue type tensile loads. Such cracks are presumed to form during fabrication or in subsequent service of a part as a result of stresses acting on sharp, notch-like defects. The crack propagation properties of chemically milled Ti6Al-4V at minus 65F are comparable to those at room temperature in application up to the 50,000 psi stress levels. (Author)

Descriptors :   *TITANIUM ALLOYS, ALUMINUM ALLOYS, CHEMICAL MILLING, FAILURE (MECHANICS), HIGH PRESSURE, JET BOMBERS, LOW TEMPERATURE RESEARCH, SHEETS, VANADIUM ALLOYS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE