Friction Stir Processing Of Aluminum Fusion Welds

Abstract

Friction stir processing (FSP) is used to modify the microstructure and the resultant properties of fusion welded aluminum alloys. Non-heat treatable 5083-H321 Al is subjected to FSP at the fusion weld toe, crown, and heat-affected zone locations. FSP affects both the local fusion weld microstructure and residual stresses. To understand the influence of FSP on fusion welds, the effect of different FSP processing approaches is investigated. The morphology and spatial distribution of precipitates and grains are examined through optical microscopy, scanning electron microscopy, and transmission electron microscopy. The relationships between microstructure and properties such as strength and ductility are discussed. Consideration is given to the local properties in transition regions between the different microstructures, i.e., fine grain FSP zone, cast fusion zone, and parent metal.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2006
Accession Number
ADA518810

Entities

People

  • Christian Fuller
  • Marray Mahoney
  • William Bingel

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Friction
  • Friction Stir Processing
  • Friction Stir Welding
  • Materials
  • Mechanical Properties
  • Metals
  • Porosity
  • Precipitates
  • Residual Stress
  • Residuals
  • Stresses
  • Tensile Properties
  • Tensile Strength
  • Tensile Stress
  • X Rays
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics