A Calorimetric Study of the Microstructures of a Thermomechanically Processed Al-10.0% Mg-0.1% Zr Alloy

Abstract

Differential scanning calorimetry (DSC) was used to investigate microstructure evolution in a high-magnesium aluminum-magnesium alloy, Al-10.0% Mg-0.1% Zr, which had been thermomechanically processed. The two variations of the thermomechanical processing (TMP) investigated resulted in an extremely fine grain size, one of the preconditions for superplastic deformation. The DSC results were consistent with previous research indicating continuous recrystallization occurs during annealing and deformation at relatively low temperatures. Additional insight into the development of the microstructure produced by the two TMP variations was obtained, especially with regard to the intermetallic Beta-phase. The DSC study also showed that a morphological difference exists in the microstructures produced by the two TMP variations used, and transmission electron microscopy (TEM) results confirmed these differences.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1986
Accession Number
ADA176109

Entities

People

  • James N. Andrews Jr.

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aluminum
  • Aluminum Alloys
  • Chemistry
  • Dispersion Hardening
  • Electron Microscopy
  • Engineering
  • Grain Size
  • Low Temperature
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Engineering
  • Metallurgy
  • Microscopy
  • Physical Metallurgy
  • Solid Solutions
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics