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Texture development in near-α Ti friction stir welds / R.W. Fonda in Acta materialia, Vol. 58 N° 19 (Novembre 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6452–6463 Titre : Texture development in near-α Ti friction stir welds Type de document : texte imprimé Auteurs : R.W. Fonda, Auteur ; K.E. Knipling, Auteur Année de publication : 2011 Article en page(s) : pp. 6452–6463 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Friction  stir  welding  Shear  texture  Titanium  alloys  Electron  backscattering  diffraction  (EBSD) Résumé : The microstructures and crystallographic textures produced during friction stir welding of the near-α Ti-5111 titanium alloy were characterized as a function of welding speed. The textures produced were compared with ideal hexagonal close packed (hcp) shear textures and with predicted textures of hcp Burgers variants of ideal body-centered cubic (bcc) shear textures, showing that the deposited welds are dominated by the hcp P1 and bcc D1 textures. The hcp P1 shear texture was dominant at slow weld speeds, while the bcc D1 shear texture was dominant at the fast weld speed. This variation appears to result from a poor transmission of the shear deformation from the rotating tool to the deposited weld that develops at faster welding speeds. These observations are compared to other studies of friction stir welds in hcp and bcc materials reported in the literature. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005112 [article] Texture development in near-α Ti friction stir welds [texte imprimé] / R.W. Fonda, Auteur ; K.E. Knipling, Auteur . - 2011 . - pp. 6452–6463. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 19 (Novembre 2010) . - pp. 6452–6463 Mots-clés : Friction  stir  welding  Shear  texture  Titanium  alloys  Electron  backscattering  diffraction  (EBSD) Résumé : The microstructures and crystallographic textures produced during friction stir welding of the near-α Ti-5111 titanium alloy were characterized as a function of welding speed. The textures produced were compared with ideal hexagonal close packed (hcp) shear textures and with predicted textures of hcp Burgers variants of ideal body-centered cubic (bcc) shear textures, showing that the deposited welds are dominated by the hcp P1 and bcc D1 textures. The hcp P1 shear texture was dominant at slow weld speeds, while the bcc D1 shear texture was dominant at the fast weld speed. This variation appears to result from a poor transmission of the shear deformation from the rotating tool to the deposited weld that develops at faster welding speeds. These observations are compared to other studies of friction stir welds in hcp and bcc materials reported in the literature. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410005112