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Ultrasonic Methods For Nondestructive Measurement Of Residual Stress

Report Number: WADD TR 61-42 Part I
Author(s): Fred Rollins
Corporate Author: Midwest Research Institute
Laboratory: Materials Central
Date of Publication: 1961-05
Pages: 27
Contract: AF 33(616)-7058
Project: 7360
Task: 73606
AD Number: AD0271108

Abstract:
Shear wave birefringence in metal specimens has been studied as a possible method of nondestructively measuring residual stresses. It has been established that the stress-induced birefringence in aluminum and steel varies linearly with the magnitude of an applied stress and does not change appreciably as these metals are deformed plastically. Other sources of birefringence were studied also. Preferred orientation is a major source especially in rolled metal stock. A pulse echo technique for observing shear wave birefringence is described and the current limitations are discussed.

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