The Role of Particles in Recrystallization of a Thermomechanically Processed Al-Mg Alloy

Abstract

The microstructural evolution related to the superplastic response of an Al-10Mg-0.1Zr alloy during thermomechanical processing (TMP) was studied. The TMP had been accomplished in previous work and consisted of 12 rolling passes, with reheating between each pass, to a total strain of 2.5. Quantitative data including length, aspect ratio and area of precipitated B-phase (Al8Mg5) particles were obtained using image analysis methods applied to the as-rolled conditions following passes 8, 10 and 12. The corresponding accumulated strains were 1.5, 2.0 and 2.6, respectively. Precipitation of the Beta-phase is complete by pass 8 and the size as well as the size distribution remained essentially unchanged in the subsequent passes. A model for particle-stimulated nucleation of recrystallization, which is based on thermodynamic considerations, is evaluated with respect to experimental data. Aluminum-Magnesium alloys, superplasticity, particle stimulated nucleation(PSN).

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1992
Accession Number
ADA257315

Entities

People

  • Stephen A. Rogers

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Alloys
  • Aspect Ratio
  • Chemistry
  • Electron Microscopy
  • Elements
  • Engineering
  • Equations
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Metals
  • Microscopy
  • Solid Solutions

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.