RESEARCH INVESTIGATION OF PHASE-REINFORCED HIGH-TEMPERATURE ALLOYS PRODUCED DIRECTLY FROM A MELT

Abstract

The results of continued investigations on whicker-reinforced high temperature eutectic alloys are presented. Ingots of Ta-Ta2C have been unidirectionally solidified at 15 cm/hr to produce a composite of aligned tantalum carbide rods and platelets within a matrix of tantalum using a modified electron beam zone melting apparatus. A consistent crystallographic relationship between Ni and NiBe interpenetrating single crystal lamellae of a eutectic grain has been examined in detail using a hard sphere atomistic model of the interface. The results of a study of cyclically loaded Ni-NiBe eutectic alloy has indicated that most of the deformation takes place within the nickel solid solution matrix. The yield strength increased with each cycle and reached a constant maximum value after four cycles.

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Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1965
Accession Number
AD0463840

Entities

People

  • F. D. Lemkey
  • M. J. Salkind

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Alloys
  • Composite Materials
  • Crystallography
  • Electron Beams
  • Energy
  • Heat Energy
  • Heat Resistant Alloys
  • High Temperature
  • Materials
  • Mechanical Properties
  • Military Research
  • Radiation
  • Solid Solutions
  • Tantalum Carbides
  • Tensile Strength
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Directed Energy
  • Microelectronics