Nano-Crystalline Aluminum Alloys Based on Al-Fe, Al-Cu and Al-Sc Systems

Abstract

Bulk nano-crystalline Al-1Fe-0.5Zr alloys were fabricated via mechanical alloying and spark plasma sintering processing exhibited high compressive yield strength of 854MPa with a plastic strain of 19% at room temperature. Compressive yield strength of 455MPa was exhibited at 250 deg C. A high strength and plastic strain was exhibited by these alloys with substantially lower amount of solute used as compared with other alloys with similar strengths. The high strength and high plastic strains has been attributed to the presence of high density of nano-crystalline grains with grain size of 65nm and a small volume faction of coarse grains distributed through the microstructure. Control of mechanical alloying process and SPS condition can be utilized to tailor the mechanical properties of nano-crystalline Al alloys through control of the microstructure.

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Document Details

Document Type
Technical Report
Publication Date
Jun 14, 2010
Accession Number
ADA522271

Entities

People

  • Kazuhiro Hono

Organizations

  • National Institute for Materials Science

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Chemistry
  • Diffraction
  • Electron Microscopy
  • Elements
  • Grain Size
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanical Working
  • Metals
  • Microstructure
  • Solid Solutions
  • Transition Metals
  • Yield Strength

Fields of Study

  • Materials science

Readers

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