Understanding the High Temperature Behavior of Niobium Aluminides; First Year Summary Report

Abstract

The mechanical and physical properties of Niobium Aluminide intermetallics for high temperature aerospace applications have been measured. NbA1 sub 3 was induction melted. Metallographic and chemical analysis has been performed to confirm the composition and microstructure. The coefficient of thermal expansion was determined. Mechanical testing included elevated temperature elastic modulus and microhardness. Continuing work will focus on applying high temperature microhardness with varying load time to creep properties. Also, ingots of the two other intermetallic phases will be received shortly, with similar characterization to follow. Near-net shape processing may be used to form test specimens. A transmission electron microscopy effort will be used to identify deformation mechanisms.

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Document Details

Document Type
Technical Report
Publication Date
Nov 08, 1990
Accession Number
ADA230202

Entities

People

  • John K. Tien

Organizations

  • University of Texas at Austin

Tags

DTIC Thesaurus Topics

  • Alloys
  • Chemical Analysis
  • Chemistry
  • Corporations
  • Electron Microscopy
  • Engineering
  • Hardness
  • High Temperature
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Microhardness
  • Microscopes
  • Microscopy
  • Physical Properties
  • Solid Solutions

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics
  • Space