Wednesday  |  Phipps  |  04:20 PM–04:40 PM

#13635, Temperature Relationship in Solid-State Additively Manufactured Aluminum Alloy 7050

In this study, Additive Friction Stir Deposition (AFSD), a thermo-mechanical solid-state additive manufacturing process, is utilized to repair AA7050 plates with a simulated damage groove and the results of the following parametric study will be discussed. Initially, a range of process parameter variables including tool rotation, actuator feed rate, and traverse velocity was tested and then used to repair a damage groove. Throughout this process, thermal data was recorded using tool face and substrate thermocouples, which determined the impact of heat input to the deposition process. Parameter sets with macro-structural defects like galling and excess flash will be contrasted by successful repairs that display a fully bonded and mechanically strong microstructure with hardness plots describing the strength of the various repair zones. Further work will include testing alternate groove geometries to prove the robust nature of the AFSD repair process for use in various military applications.

Ismael Hidalgo   The University of Alabama
James Tew   The University of Alabama