Unidentified as to Use or Source Objects With Questioned Internal Components Submitting Metallurgy Evidence Comparison Comparison examinations can determine whether two metals or metallic objects came from the same source or from each other. Examinations can determine mechanical properties such as the response of a metal to an applied force or load.
Examinations can also determine chemical composition including alloying and trace elements.
The magnitude of the force or load that caused the failure, how the force or load was transmitted to the metal, and the direction it was transmitted can also be determined. Burned, Heated, or Melted Metal Examinations can determine the temperature at which a metal was exposed, the nature of the heat source, and whether a metal was in an electrical short-circuit situation. Thermally damaged box springs. Cut or Severed Metal Examinations can determine the method by which a metal was severed, such as sawing, shearing, milling, turning, arc cutting, or flame cutting. The skill of the person who made the cut and the length of time it took to make the cut can also be determined.