초록 ▼

A method for quality assurance of a laser process and more particularly a laser shock peening process that uses a test coupon having a deflection formed by a laser firing. The test coupon is from a metallic strip having opposite first and second sides that generally define a plane of the strip and t

A method for quality assurance of a laser process and more particularly a laser shock peening process that uses a test coupon having a deflection formed by a laser firing. The test coupon is from a metallic strip having opposite first and second sides that generally define a plane of the strip and the strip includes a laser shock peened patch of the strip that has first and second laser shock peened surfaces on the first and second sides, respectively, first and second laser shocked regions having deep compressive residual stresses imparted by the laser shock peening extending into the strip from the first and second laser shock peened surfaces, respectively, and a deflection of a portion of the strip from a position of the portion before the laser shock peening. The deflection is formed by the laser shock peening such that at least a part and preferably substantially all of the deflection lies in the plane of the strip and the test coupon preferably includes an indicating means to indicate the deflection. The quality assurance process of the present invention may further include correlating high cycle fatigue to the deflection.

대표청구항 ▼

[ We claim:] [1.] A method for quality control of a laser shock peening process, said method comprising the following steps:mounting a test coupon in a laser shock peening apparatus wherein the coupon is a metallic strip having opposite first and second sides that generally define a plane of the str

[ We claim:] [1.] A method for quality control of a laser shock peening process, said method comprising the following steps:mounting a test coupon in a laser shock peening apparatus wherein the coupon is a metallic strip having opposite first and second sides that generally define a plane of the strip,laser shock peening a patch of the strip and forming at least a first laser shock peened surface within the patch on at least one of the first and second sides wherein a first laser shocked region having deep compressive residual stresses imparted by the laser shock peening extends into the strip from the first laser shock peened surface, and wherein the shape of the coupon and location of the patch is such that said laser shock peening produces a measurable deflection of at least a portion of the strip and at least a part of said deflection lies in said plane, andmeasuring said deflection in said plane.