6533b85afe1ef96bd12b9ff7

RESEARCH PRODUCT

CDRX modelling in friction stir welding of AA7075-T6 aluminum alloy: analytical approaches

Livan FratiniGianluca BuffaRajiv Shivpuri

subject

FEMMaterials scienceMetallurgyAlloyMetals and AlloysRecrystallization (metallurgy)continuous dynamic recrystallizationWeldingengineering.materialIndustrial and Manufacturing EngineeringGrain sizeFinite element methodForgingaluminum alloy friction stir weldingComputer Science Applicationslaw.inventionlawModeling and SimulationCeramics and CompositesengineeringFriction stir weldingFriction weldingSettore ING-IND/16 - Tecnologie E Sistemi Di Lavorazione

description

Abstract Friction stir welding (FSW) is an energy efficient and environmentally “friendly” (no fumes, noise, or sparks) welding process, during which the workpiece are welded together in a solid-state joining process at a temperature below the melting point of the workpiece material under a combination of extruding and forging. Significant microstructural evolution takes place during FSW: in particular continuous dynamic recrystallization (CDRX) phenomena result in a highly refined grain structure in the weld nugget and strongly affect the final joint resistance. In the paper two different analytical models aimed to the determination of the average grain size due to continuous dynamic recrystallization phenomena in FSW processes of AA7075-T6 aluminum alloys have been implemented in a 3D FEM model and numerical analyses of the welding processes have been performed to verify their effectiveness.

yearjournalcountryeditionlanguage
2007-08-01
10.1016/j.jmatprotec.2007.03.033http://hdl.handle.net/10447/8913