Solidification Processing and Phase Transformations in Ordered High Temperature Alloys

Abstract

Useful high temperature alloys generally have microstructures consisting of more than one phase. Multiphase microstructures are necessary to develop acceptable toughness and creep strength in high temperature intermetallic alloy matrices. The optimum microstructures must be developed by a careful selection of processing path that includes both solidification and solid state heat treatment. Research has been conducted on the rapid solidification of selected intermetallic alloys and on the phase transformation paths that occur during cooling, primarily in the Ti-Al-Nb system. This report describes research performed in the Metallurgy Division at NIST under DARPA order 7469 between 1/1/ 89 and 12/31/92. Various research tasks were completed and the results have been published or have been submitted for publication.... Intermetallics, Ti-Al-Nb Alloys, Phase Diagrams, Phase Transformations, Ti-Al-Ta Alloys, MoSi2 Alloys.

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Document Details

Document Type
Technical Report
Publication Date
Jan 20, 1993
Accession Number
ADA261751

Entities

People

  • Leonid A. Bendersky
  • Ursula R. Kattner
  • William J. Boettinger

Organizations

  • National Institute of Standards and Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Critical Temperature
  • Crystal Structure
  • Crystallography
  • Crystals
  • Diffraction
  • Heat Energy
  • Heat Resistant Alloys
  • Materials
  • Materials Engineering
  • Materials Science
  • Phase Diagrams
  • Phase Transformations
  • Solid Solutions
  • Thermodynamics
  • Transition Temperature
  • Transitions

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.