초록 ▼

Method of changing the residual compressive stresses of an area of a workpiece by tailoring multiple laser beams applied to the workpiece. In one embodiment, a relatively long duration laser pulse is applied to the workpiece followed by a relatively short duration laser pulse. Other tailoring embodi

Method of changing the residual compressive stresses of an area of a workpiece by tailoring multiple laser beams applied to the workpiece. In one embodiment, a relatively long duration laser pulse is applied to the workpiece followed by a relatively short duration laser pulse. Other tailoring embodiments used to increase the total residual compressive stress of workpieces include blending two laser pulses, or splicing them utilizing a first short sliced-type beam combined with a relatively long duration, high powered gaussian laser beam pulse. A third embodiment utilizes two or more laser beams or pulses of different wavelengths.

대표청구항 ▼

[ We claim:] [1.] A laser peening method for changing the residual compressive stresses of an area of a workpiece, the method comprising the steps of:generating a first laser pulse of relatively long duration and applying it to a first area of the workpiece; andgenerating a second laser pulse of rel

[ We claim:] [1.] A laser peening method for changing the residual compressive stresses of an area of a workpiece, the method comprising the steps of:generating a first laser pulse of relatively long duration and applying it to a first area of the workpiece; andgenerating a second laser pulse of relatively short duration and applying it to a second area of the workpiece.