Published in Review of Scientific Instruments, Volume 56, Issue 8, August 1, 1985, pages 1632-1634.
Copyright © 1985 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Review of Scientific Instruments and may be found at http://dx.doi.org/10.1063/1.1138114 .
NOTE: At the time of publication, the author Blair London was not yet affiliated with Cal Poly.
The study of small surface fatigue cracks in AISI 4140 quenched and tempered steel by a nondestructive surface acoustic wave technique is summarized. A novel cantilevered bending, plate-type fatigue specimen is described that is compatible with the acoustic method. Small cracks are initiated from a 25-μm deep surface pit produced by an electrospark machine. The importance of studying these
Materials Science and Engineering