Mechanical Behavior of Ultrafine-grained Al Composites Reinforced with B4C Nanoparticles

Abstract

The influence of nanoscale reinforcement on the mechanical behavior of ultrafine-grained composites was studied. Al 5083 (Al-4.5 Mg-0.57Mn-0.25Fe) composites, with grain size of 115 nm and B4C reinforcement size of 38 nm, were fabricated via cryomilling and consolidation. The result reveals that the presence of nanoparticles enhances strength by interacting with dislocations, while simultaneously retarding grain growth. Furthermore, the nanoparticles-reinforced composite exhibits enhanced plasticity relative to the same material reinforced with micrometric particles. The underlying mechanisms are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2011
Accession Number
ADA549233

Entities

People

  • Chris Haines
  • Deepak Kapoor
  • Enrique J. Lavernia
  • Joseph Paras
  • Julie Schoenung
  • Rustin Vogt
  • Troy Topping
  • Ying Li
  • Yizhang Zhou
  • Zhihui Zhang

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemical Engineering
  • Composite Materials
  • Crystal Structure
  • Dislocations
  • Engineering
  • Geometry
  • Grain Growth
  • Grain Size
  • Materials
  • Materials Science
  • Nanoparticles
  • Particle Size
  • Particles
  • Plastic Properties
  • Powders
  • Ultrafines
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Biotechnology