Article
Strain dependence of electromagnetic generation of ultrasonic surface waves in ferrous metals
Applied Physics Letters
(1976)
Abstract
It is demonstrated that the efficiency of the electromagnetic generation of ultrasonic surface waves in ferrous metals is strongly influenced by superimposed elastic strains. A graph of efficiency versus applied magnetic field has many features, and the changes of these in Armco iron and 1018 Steel are reported for the strain range −3×10−3 <Δl/l <3×10−3 (‖calculated stress‖<620 MN/m2 or 90 KSI). Striking changes are observed, particularly for fields below 200 Oe. The results are interpreted in terms of the strain dependence of the magnetostrictive properties of the material. Possible applications of the effect to nondestructively measure residual stress are considered.
Disciplines
Publication Date
May 1, 1976
Publisher Statement
Copyright 1976 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 Applied Physics Letters 28, no. 9 (1976): 483–485 and may be found at http://link.aip.org/link/doi/10.1063/1.88852.
Citation Information
R. Bruce Thompson. "Strain dependence of electromagnetic generation of ultrasonic surface waves in ferrous metals" Applied Physics Letters Vol. 28 Iss. 9 (1976) Available at: http://works.bepress.com/rbruce_thompson/40/