Accession Number : AD0753198

Title :   Effect of Sheet Thickness on the Fracture Resistance K sub c Parameter for Titanium Alloys.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Freed,C. N. ; Sullivan,A. M. ; Stoop,J.

Report Date : 08 NOV 1972

Pagination or Media Count : 22

Abstract : The influence of sheet thickness on the plane stress fracture resistance parameter K sub c has been investigated for four high-strength titanium alloys. The center-cracked-tension (CCT) specimen was employed over a thickness range from 1/32 to 1/8 in. The effect of thickness on K sub c varied with each alloy. The more frangible alloys evidenced peak K sub c values in thinner specimens than those alloys manifesting higher fracture resistance. Slit tips with 1-mil radii indicated lower K sub c values than tips of 3 to 5 mils. No influence of initial crack length was noted over the range studied. The data were applied to a model which postulates the K sub c dependency on thickness. (Author)

Descriptors :   (*TITANIUM ALLOYS, FRACTURE(MECHANICS)), SHEETS, THICKNESS

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE