Method to inspect directionally solidified castings

摘要

A method for detecting defects in metallic parts, comprising the steps of providing a metallic surface comprising a repeating microstructure and at least one surface defect, redirecting an incident light beam off of an area of the metallic surface comprising the at least one surface defect thereby forming a redirected light beam, observing the redirected light beam, detecting at least a portion of the redirected light beam resulting from redirection off of the at least one surface defect.