Patent ID: 7464577

Claim:
A method of fabricating a workpiece that includes a bore therethrough, said method comprising: inserting a tool into the bore in a first axial direction; applying a predetermined axial force to a tool; applying a predetermined axial force to the tool to cause the tool to be partially inserted into the bore defined in the workpiece in the first axial direction; determining a desired axial gap distance that is adjacent to a travel stop face of the tool, wherein the travel stop face limits travel of the tool, and wherein the desired axial gap distance corresponds to the predetermined axial force; and providing the axial gap that is adjacent to the travel stop face that is approximately equal to the desired axial gap distance; translating, during insertion of the tool into the bore, the axial force into a radial force in the workpiece using the tool until the axial gap is substantially closed; and generating a hoop stress in the workpiece using the radial force, wherein the hoop stress is sufficient to at least partially reduce residual stresses in the workpiece.