| 摘要 |
PROBLEM TO BE SOLVED: To provide a sham test piece for non-destructive inspection capable of easily and inexpensively obtaining a sham test piece having a grain boundary stress corrosion crack and a non-destructive inspection method applied to this technique. SOLUTION: An arbitrary region of a test piece 2 the same to a metal member constituting an actual machine plant is coated with a metal having a m.p. lower than that of the test piece 2 over an arbitrary range and, after welding heat is applied to the vicinity of the coated region, the coated region is cooled to generate a grain boundary stress corrosion crack within the range of the coated region. By this constitution, a sham examination object 1 for non- destructive inspection having a grain boundary stress corrosion crack near to a natural crack (flaw) generated in an actual machine can be obtained easily and inexpensively. |
