Heat Transfer Effects Arising During the Linear Friction Welding of Ti-6Al-4V

摘要

Ti-6Al-4V is the most common titanium alloy used inrnthe aero-engine industry. In particular, it is anrnimportant material for the production of rotor bladesrnand discs, and blisks (integrally bladed-discs). Blisksrnhave benefits over conventional rotors, but a methodrnof joining the two together is necessary, with linearrnfriction welding (LFW) being one possible route. Thisrnpaper considers the temperature profiles caused byrnfrictional heating and the heat dissipation during thisrnwelding process. Thermal cycles experienced by Ti-rn6Al-4V were measured, by placing thermocouplesrnclose to the welded joint. The experimental results arerncompared with the predictions of a numerical modelrnfor the linear friction welding process. Comparisonrnbetween the experimental data and the modelling isrnshown to be reasonable.