Manufacturing Methods for Form Rolling Complex Shapes of High Strength Titanium Alloys.
Final technical rept. 1 Mar 65-30 Jun 69,
ENGELHARD INDUSTRIES ATTLEBORO MA D E MAKEPEACE
Pagination or Media Count:
The object of the program was the determination of manufacturing processes for Form Rolling the high strength Titanium 8 Al, 1 Mo, 1 V alloy for structural and airfoil configurations as net shapes which require no further machining or material removal to obtain metallurgical properties, contours, and close tolerances. It was established that the Ti 8-1-1 alloy can be Form Rolled to complex net shapes if forming is performed at a temperature in the range of 1400-1650F. Surface contamination which occurs during heating cannot be eliminated by the use of any protection coatings presently available, but it can be removed by a simple cleaning and pickling operation. The T section was produced, but more adequate tooling materials for the swaging operations would be desirable. The use of a larger powered Turks-head for the finishing operations would reduce costs and improve quality. Airfoil sections were produced which are within target tolerances except at the trailing edge. It appears that a minimum trailing edge thickness of 0.020 inch may be required for airfoil Form Rolled in the Ti 8-1-1 alloy.
- Metallurgy and Metallography
- Fabrication Metallurgy