Journal
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
Volume 16, Issue 4, Pages 288-294Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1362171811Y.0000000010
Keywords
Friction stir welding; Texture; Shear; Recrystallisation
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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/(B) over bar ideal shear texture in fcc materials, the D-1 ideal shear texture in bcc materials, and the P-1 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 D-1 (after transformation to the hcp phase according to the Burgers orientation relationship) and the hcp P-1 shear textures. Thus, similar shear textures develop in friction stir welds of fcc, bcc and hcp materials.
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