THE PROPERTIES OF TINI AND ASSOCIATED PHASES

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.

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Document Details

Document Type
Technical Report
Publication Date
Aug 03, 1961
Accession Number
AD0266607

Entities

People

  • R. C. Wiley
  • W. J. Buehler

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Structure
  • Heat Energy
  • Heat Treatment
  • Hot Working
  • Magnetic Properties
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Phase Transformations
  • Physical Properties
  • Solid Solutions
  • Tensile Properties
  • Tensile Strength
  • Transition Temperature
  • Transitions

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Metallurgy