High Toughness Titanium Alloy Development.
Final engineering rept. May 73-Jul 74,
ROCKWELL INTERNATIONAL CORP LOS ANGELES CALIF LOS ANGELES AIRCRAFT DIV
Pagination or Media Count:
The goals of this program were to develop titanium alloys having fracture toughnessstrength characteristics which, in combination, exceeded the properties of current commercially available alloys. The goal properties were a tensile strength UTS of 135 ksi at a toughness of 100 ksi in. andor UTS of 170 ksi with a toughness of 80 ksi in. This effort consisted of two consecutive phases. Phase I included the preparation and evaluation of twenty pound heats of twenty different alloy compositions and five pound heats of two additional alloy compositions, in order to select one or two compositions having the potential of achieving the contract strength-toughness goals. Phase II included a scale-up of the two alloys Ti 5Mo 4.5Al 1.5Cr and Ti 8Mo 2.5Al 1.5Cr selected from Phase I to larger 500 pound ingots. These larger ingots were then processed through a variety of processing sequences designed to produce a range of microstructures and properties. Extensive property evaluations were then performed on several microstructural conditions.
- Metallurgy and Metallography