Superplasticity of Ultra-Fine Grained Aluminium Alloys

Abstract

Superplasticity requires a fine grain size, typically in the range of 1 - 10 microns. Experiments have established that much finer grain sizes, in the near-nanometer range, may be achieved in Al-based alloys by using an intense plastic straining technique such as equal-channel angular (ECA) pressing. This report presents the microstructural characteristics and mechanical properties of several ultrafine-grained Al-based alloys processed by ECA pressing. The first demonstration of enhanced superplasticity at low temperatures and high strain rates revealed in commercial Al-alloys, having ultrafine-grained structure, are described.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1997
Accession Number
ADA335381

Entities

People

  • N. K. Tsenev
  • R. K. Islamgaliev
  • R. Z. Valiev

Organizations

  • Ufa State Aviation Technical University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Human Systems

DTIC Thesaurus Topics

  • Advanced Materials
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Composite Materials
  • Crystal Lattices
  • Grain Size
  • Low Temperature
  • Materials
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Metal Matrix Composites
  • Metals
  • Particles
  • Sheet Metal

Fields of Study

  • Materials science

Readers

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