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.
|Titolo della pubblicazione ospite||Sheet Metal 2011|
|Numero di pagine||6|
|Stato di pubblicazione||Published - 2011|
|Nome||KEY ENGINEERING MATERIALS|
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering