Accession Number:

AD0653080

Title:

SHOCK-INDUCED TRANSFORMATION OF TITANIUM-NICKEL ALLOYS,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

• Coleburn,N. L.

Report Date:

1967-05-01

Pagination or Media Count:

33.0

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

Descriptors:

• (*NICKEL ALLOYS
• SHOCK WAVES)
• (*TITANIUM ALLOYS
• SHOCK WAVES)
• (*SHOCK WAVES
• *PHASE STUDIES)
• COMPRESSIVE PROPERTIES
• EXPLOSION EFFECTS
• GRAIN STRUCTURES(METALLURGY)
• MARTENSITE
• INTERMETALLIC COMPOUNDS
• THERMAL PROPERTIES

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE