Accession Number:

ADA261751

Title:

Solidification Processing and Phase Transformations in Ordered High Temperature Alloys

Descriptive Note:

Final rept. 30 Mar 1990-30 Sep 1992

Corporate Author:

NATIONAL INST OF STANDARDS AND TECHNOLOGY GAITHERSBURG MD METALLURGY DIV

Report Date:

1993-01-20

Pagination or Media Count:

195.0

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 11 89 and 123192. 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.

Subject Categories:

  • Laminates and Composite Materials
  • Metallurgy and Metallography
  • Properties of Metals and Alloys
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE