Residual Stress Characterization by Scanning Electron Acoustic Microscopy

The experimental observations in this work provide much information about the residual stress distribution in metals left by an indentation. The unique nondestructive capabilities of the SEAM, such as laminated imaging with either frequency or phase varied, signify a potential application of SEAM as a nondestructive tool for the characterization of residual stress in micro-scales. A further work on the mechanism and theoretical explanation of the residual stress distribution in EA images is in progress.