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RESEARCH PAPERS

Measurement of Near Surface Residual Stresses Using Electric Discharge Wire Machining

[+] Author and Article Information
W. Cheng, I. Finnie, M. Gremaud, M. B. Prime

Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Eng. Mater. Technol 116(1), 1-7 (Jan 01, 1994) (7 pages) doi:10.1115/1.2904251 History: Received July 29, 1992; Revised April 19, 1993; Online April 29, 2008

Abstract

In previous work it has been shown that near surface residual stresses may be deduced from surface strains produced by making a cut of progressively increasing depth. The process of electric discharge wire machining (EDWM), by providing very narrow cuts, greatly improves the ability of the method to resolve a stress gradient near the surface. However, the EDWM process may also introduce residual stresses. In the present work a model for estimating the influence of EDWM is presented, and a procedure for eliminating its effect on residual stress measurement is developed. Experimental results validate the theoretical approach.

Copyright © 1994 by The American Society of Mechanical Engineers
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