Development of Metastable Processing Paths for High Temperature Alloys

Abstract

The development of acceptable toughness and creep strength in high temperature intermetallic alloy matrices is closely related to the formation of proper distributions of second phase particles. Phases are needed both to arrest crack growth as low temperatures and to resist creep at high temperature intermetallic compounds has been investigated. In particular rapid solidification and/or rapid solid state quenching followed by controlled heat treatment can provide new and unusual microstructures of multiphase materials. This report describes research to: (a) develop an experimental basis and predictive models for solubility extension and metastable phase formation of intermetallic compounds by rapid solidification, (b) analyze the kinetics of decomposition of metastable phases involving ordering and (c) improve the phase diagram modeling of systems involving ordered phases. Keywords: Intermetallics, Ti/Nb Aluminides, Phase diagram, Rapid solidification, Ternary alloys, Solid state quenching.

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1990
Accession Number
ADA223144

Entities

People

  • Benjamin A. Burton
  • John W. Cahn
  • Leonid A. Bendersky
  • Ursula R. Kattner
  • William J. Boettinger

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Critical Temperature
  • Crystal Lattices
  • Crystal Structure
  • Crystallization
  • Crystallography
  • Crystals
  • Heat Energy
  • Heat Treatment
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Phase Diagrams
  • Phase Transformations
  • Thermodynamics
  • Transition Temperature

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Reinforced Composite Materials