Study of Processing and Microstructure of a Superplastic 5083 Aluminum Alloy

Abstract

Orientation Imaging Microscopy (OIM) methods were applied to the analysis of the microstructure and microtexture as well as the deformation and failure modes of superplastic AA5083 aluminum alloys. Annealing of a cold-rolled AA5083 material at 450 deg C resulted in the formation of equiaxed grains approximately 7mum-8mum in size. Random grain-to-grain misorientations were consistent with particle-stimulated nucleation of recrystallization during processing for superplasticity. Such as microstructure is necessary for superplasticity but mechanical property data indicated only moderate ductility and failure by cavity formation and linkage. This investigation then employed OIM methods to identify the misorientations of boundaries prone to cavitation and determine the role of such boundaries in failure of these materials during elevated temperature deformation.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2002
Accession Number
ADA407247

Entities

People

  • Tracy A. Maestas

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aluminum Alloys
  • Boundaries
  • Creep
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Ductility
  • Elastic Properties
  • Failure Mode And Effect Analysis
  • Grain Boundaries
  • Grain Growth
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Microscopy
  • Silicon Carbide

Fields of Study

  • Materials science

Readers

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