Development of Metastable Processing Paths for High Temperature Alloys

Abstract

The development of acceptable toughness and creep strength in high temperature intermetallic alloys is closely related to the formation of proper distributions of second phase particles. Phases are needed both to arrest crack growth at low temperatures and to resist creep at high temperatures. The possibility of developing new processing strategies for high temperature intermetallic compounds is being investigated. In particular rapid solidification and/or rapid solid state quenching followed by controlled heat treatment may provide new and unusual microstructures of multiphase materials. This report describes research performed in the Metallurgy Division at NIST to: (a) develop 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: Physical properties; Reaction kinetics; Molecule molecule interaction; Metal alloys.

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Document Details

Document Type
Technical Report
Publication Date
May 23, 1989
Accession Number
ADA210550

Entities

People

  • John W. Cahn
  • L. A. Bendersky
  • Ursula R. Kattner
  • William J. Boettinger

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Chemistry
  • Crystal Structure
  • Decomposition
  • Electron Diffraction
  • Electron Microscopy
  • Heat Treatment
  • High Temperature
  • Intermetallic Compounds
  • Materials
  • Microscopy
  • Phase
  • Phase Diagrams
  • Phase Transformations
  • Solid Solutions
  • Transmission Electron Microscopy
  • X Rays

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Computational Modeling and Simulation
  • Metallurgy