Texture Development in Friction Stir Welds

Abstract

The shear textures that develop in friction stir welds are reviewed and discussed. In all the materials examined, including face centred cubic (fcc), body centred cubic (bcc) and hexagonal close-packed (hcp) materials, friction stir welding produces a predominant shear texture with the close-packed directions aligned with the shear direction (SD) and the close-packed plane normal perpendicular to both the SD and the shear plane normal. This orientation corresponds to the B/BB ideal shear texture in fcc materials, the D1 ideal shear texture in bcc materials, and the P1 ideal shear texture in hcp titanium alloys. Titanium friction stir welds fabricated above the Beta transus temperature can contain evidence of ideal shear texture components from both the bcc D1 (after transformation to the hcp phase according to the Burgers orientation relationship) and the hcp P1 shear textures. Thus, similar shear textures develop in friction stir welds of fcc, bcc and hcp materials.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2011
Accession Number
ADA541963

Entities

People

  • K. E. Knipling
  • R. W. Fonda

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Crystal Structure
  • Diffraction
  • Friction
  • Friction Stir Processing
  • Friction Stir Welding
  • High Temperature
  • Magnesium Alloys
  • Materials
  • Mechanical Properties
  • Metals
  • Orientation (Direction)
  • Stainless Steel
  • Titanium
  • Titanium Alloys

Readers

  • Materials Science and Engineering.
  • Metallurgy