Accession Number:

AD0266607

Title:

THE PROPERTIES OF TINI AND ASSOCIATED PHASES

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

Report Date:

1961-08-03

Pagination or Media Count:

109.0

Abstract:

A new class of alloys based on the ductile intermetallic compound TiNi and associated phases Ti2Ni, TiNi3 was investigated. The most phasepure TiNi composition was found at about 54.5 wt Ni. This composition body- centered cubic crystal structure possessed good room temperature ductility and a moderately high melting point, about 1300 C. The room temperature mechanical properties of the pure TiNi phase hot worked indicated a maximum ductility of 15 tensile elongation and up to 28 ft-lbs impact strength. An ultimate tensile strength of 124,000 psi was also measured. TiNi appears to have usable strength up to about 649 C. TiNibase alloys, with excess Ni added, were capable of being hardened by quenching. Quenched hardnesses as high as 62 Rockwell C were obtained. They showed a marked improvement in hot hardness over the predominantly phase-pure TiNi at temperatures up to 482 C.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE