ULTRASONIC AND EDDY CURRENT NON-DESTRUCTIVE INVESTIGATION OF HOLLOW ALUMINUM EXTRUSIONS Document Details Document Type Technical Report Publication Date Dec 13, 1961 Accession Number AD0270412 Entities People T.w. Brown Tags DTIC Thesaurus Topics Aluminum Eddy Currents Electric Current Electricity Elements Extrusion Fabrication Group 13 Elements Material Forming Processes