FRACTURE RESISTANCE CHARACTERISTICS OF Ti-6Al-2Mo AND Ti-6Al-4V IN 3 IN. THICK SECTIONS
NAVAL RESEARCH LAB WASHINGTON DC
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The fracture resistance properties of Ti-6Al-2Mo 6-2 and Ti-6Al-4V 6-4 alloys in 3 in. 7.6 cm rolled plate section were investigated using the Dynamic Tear DT test and fracture mechanics tests, together with associated Ratio Analysis Diagram RAD procedures. The subject materials were low-oxygen O2 0.08 wt percent alloys rolled from 12,000 lb. 5450 kg ingots the 6-2 alloy was beta forged and beta rolled from 2050F 1120C while the 6-4 alloy was beta forged at 2050F 1120C and alpha-beta rolled at 1750F 970C. Full- thickness DT tests and standard 1 in. DT tests of specimens at plate surface and center locations of both plates in the as-rolled condition revealed considerable anisotropy with respect to fracture resistance for both plates. A high degree of variation of toughness properties through the thickness of the as-rolled plates was also recorded.
- Metallurgy and Metallography
- Solid State Physics