Computer Aided Design of an Effective Fixture for FSW Processes of Titanium Alloys

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Abstract

During the last years welded titanium components have been extensively applied inaeronautical and aerospace industries because of their high specific strength and corrosionresistance properties. Friction Stir Welding (FSW) is a solid state welding process, currentlyindustrially utilized for difficult to be welded or “unweldable” aluminum and magnesium alloys,able to overcome the drawbacks of traditional fusion welding techniques. When titanium alloys areconcerned, additional problems arise as the need for very high strength and high temperatureresistant tools, gas shield protection and high stiffness machines. Additionally, the process ischaracterized by an elevated sensitivity to temperature variations, which, in turn, depends on themain operative parameters. Numerical simulation represents the optimal solution in order toperform an effective process optimization with affordable costs. In this paper, a fully 3D FEMmodel for the FSW process is proposed, that is thermo-mechanically coupled and with rigidviscoplasticmaterial behavior. Experimental clamping parts are modeled and the thermal loads arecalculated at the varying of the cooling strategy. Finally, the effectiveness of the cooling systems isevaluated through experimental tests.
Lingua originaleEnglish
Titolo della pubblicazione ospiteSheet Metal 2011
Pagine304-309
Numero di pagine6
Stato di pubblicazionePublished - 2011

Serie di pubblicazioni

NomeKEY ENGINEERING MATERIALS

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cita questo

Fratini, L., & Buffa, G. (2011). Computer Aided Design of an Effective Fixture for FSW Processes of Titanium Alloys. In Sheet Metal 2011 (pagg. 304-309). (KEY ENGINEERING MATERIALS).