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RESEARCH PAPERS

Holographic Detection of Microcracks

[+] Author and Article Information
C. M. Vest

Department of Mechanical Engineering and Radar and Optics Laboratory, The University of Michigan, Ann Arbor, Mich.

E. L. McKague

General Dynamics, Fort Worth Division, Fort Worth, Texas

A. A. Friesem

Radar and Optics Laboratory, The University of Michigan; Advanced Optics Center, Radiation, Inc., Ann Arbor, Mich.

J. Basic Eng 93(2), 237-241 (Jun 01, 1971) (5 pages) doi:10.1115/1.3425219 History: Received August 01, 1969; Online October 27, 2010

Abstract

This paper describes the application of optical holographic interferometry to the detection of microcracks in metals. In particular, detection of radial cracks extending from bolt holes in high strength aircraft steel was studied. The method was found to hvve several advantages over currently used detection methods. The results of the holographic study compared favorably with independent results obtained by magnaflux, eddy current, and X-ray inspection. Some evidence of a possible ability to detect untempered martensite deposits was also noted.

Copyright © 1971 by ASME
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