Rapid Solidification Processing and Powder Metallurgy of Al Alloys.

Abstract

During the first period of performance, three tasks have been undertaken. These involve first a study of the specific microstructural changes that accompany rapid solidification of a number of Al alloys together with a determination of the thermal stability of these microstructures, second the production of rapidly solidified particulate and third the use of dynamic powder compaction (DPC) for the consolidation of rapidly solidified particulate in the absence of prolonged thermal excursions. A number of alloys have been rapidly solidified using laser surface melting and melt-spinning and in each case the observed microstructure has been interpreted in terms of the undercooling achieved during processing. Rapidly solidified (gas atomized) powders of 7091 have been consolidated using DPC. Is has been shown that bulk samples may be produced that are close to theoretical density.

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Document Details

Document Type
Technical Report
Publication Date
Sep 19, 1983
Accession Number
ADA133873

Entities

People

  • H.L. Fraser

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Cellular Structures
  • Dispersions
  • Electron Microscopy
  • Energy
  • Fiber Spinning
  • Heat Energy
  • Heat Of Fusion
  • Heat Treatment
  • Materials
  • Measurement
  • Mechanical Properties
  • Metallurgy
  • Particles
  • Powder Metallurgy
  • Powders
  • Thermal Stability
  • Wave Propagation

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Directed Energy