Fracture Toughness Measurements of Three Titanium Alloy Extrusions
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
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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 5.91 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.
- Properties of Metals and Alloys