Accession Number : AD0766682

Title :   Fracture Toughness Measurements of Three Titanium Alloy Extrusions.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : DeSisto,Thomas S.

Report Date : JUL 1973

Pagination or Media Count : 17

Abstract : NIUM ALLOY 11.5MO 4.5SN 6ZRPlane strain static K sub (Ic) and dynamic, K sub (Id) measurements were obtained on three-inch-diameter titanium alloy extrusions which received a 5.9:1 reduction followed by air cooling. The alloys investigated were Ti-6Al-6V-2Sn, Ti-8Mo-8V-2Fe-3Al, and Ti-11.5Mo-6Zr-4.5Sn (Beta III). Compact tension specimens were used to obtain K sub (Ic) measurements and precracked standard Charpy V-notched specimens were used to obtain K sub (Id) measurements. The highest K sub (Ic) and K sub (Id) values were obtained from the Beta III extrusion while the lowest K sub (Ic) and K sub (Id) values were obtained for the Ti-8Mo-8V-2Fe-3Al extrusion. Good agreement was found to exist between K sub (Ic) values obtained from precracked Charpy V-notch specimens and compact tension specimens. (Author)

Descriptors :   (*TITANIUM ALLOYS, *FRACTURE(MECHANICS)), TOUGHNESS, TENSILE PROPERTIES, MICROSTRUCTURE, STRAIN HARDENING, FATIGUE(MECHANICS), EXTRUSION, HEAT TREATMENT

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE