%0 conference lecture %@ %A Reimann, M., Goebel, J., dos Santos, J.F. %D 2017 %J 28th AeroMat Conference and Exposition, AeroMat 2017 %T Microstructure Evolution and Mechanical Properties of Keyhole Repair Welds in AA 2219-T851 using Refill Friction Stir Spot Welding %U %X