SHOCK-INDUCED TRANSFORMATION OF TITANIUM-NICKEL ALLOYS,
Abstract
The report describes the behavior under shock wave compression of three compound alloys of titanium and nickel. Explosive-propelled metal plates transmitted pressures of up to 0.8 megabar in specimens with 50.3 atomic % Ni, 51.4 atomic % Ni, and 55.0 atomic % Ni. Shock wave and free-surface velocities were measured optically. The corresponding compression points were determined from the Rankine-Hugoniot equations. The data reveal that the dynamic compressibilities of Ti-Ni alloys are sensitive to temperature changes. At 90 kbars the microstructure of the near stoichiometric 50.3 atomic % Ni undergoes an almost complete martensitic transformation. The transformation is less evident in 51.4 atomic % Ni. The 55.0 atomic % Ni alloy is unchanged by the 90-kbar shock. At 270-280 kbars the shock velocity in stoichiometric Ti-Ni specimens, initially at 15C, becomes insensitive to pressure. The formation of a new phase is indicated. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0653080
Entities
People
- N. L. Coleburn
Organizations
- Naval Ordnance Laboratory