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Mechanical and metallurgical effects of in process cooling during friction stir welding of AA7075-T6 butt joints / L. Fratini in Acta materialia, Vol. 58 N° 6 (Avril 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2056–2067 Titre : Mechanical and metallurgical effects of in process cooling during friction stir welding of AA7075-T6 butt joints Type de document : texte imprimé Auteurs : L. Fratini, Auteur ; G. Buffa, Auteur ; R. Shivpuri, Auteur Année de publication : 2011 Article en page(s) : pp. 2056–2067 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Friction  stir  welding  Finite  element  modeling  In  process  cooling  treatments Résumé : This paper presents the results of a combined experimental and numerical investigation focused on the effects of an in process water cooling treatment aimed at improving the final quality of friction stir welded butt joints in terms of mechanical resistance and metallurgy of the processed material. Micro and macro observations, together with the evolution of an already developed finite element tool, have been used to analyze specimens obtained under different process conditions. Water cooling was found to enhance joint strength, reducing the material softening usually observed in the thermo-mechanically affected zone area, with no detrimental effect on nugget integrity. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008271 [article] Mechanical and metallurgical effects of in process cooling during friction stir welding of AA7075-T6 butt joints [texte imprimé] / L. Fratini, Auteur ; G. Buffa, Auteur ; R. Shivpuri, Auteur . - 2011 . - pp. 2056–2067. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 6 (Avril 2010) . - pp. 2056–2067 Mots-clés : Friction  stir  welding  Finite  element  modeling  In  process  cooling  treatments Résumé : This paper presents the results of a combined experimental and numerical investigation focused on the effects of an in process water cooling treatment aimed at improving the final quality of friction stir welded butt joints in terms of mechanical resistance and metallurgy of the processed material. Micro and macro observations, together with the evolution of an already developed finite element tool, have been used to analyze specimens obtained under different process conditions. Water cooling was found to enhance joint strength, reducing the material softening usually observed in the thermo-mechanically affected zone area, with no detrimental effect on nugget integrity. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409008271