Relative Reluctances in Thick Aluminum Samples
The effects of sample thicknesses, frequencies, and values of lift-off on real and imaginary reluctances for a modified ac magnetic bridge were found for aluminum. Aluminum test samples with thicknesses varying between 0.406 and 6.35 millimeters were scanned at values of lift-off ranging from 0.1 to 0.38 millimeters and at frequencies between 200 and 5000 Hz.
KeywordsSample Thickness Continuous Curve Skin Depth Corrosion Loss Imaginary Impedance
Unable to display preview. Download preview PDF.
- 2.O.H. Zinke, U.S. Patent No. 4,901,017, 13 February 1990.Google Scholar
- 3.W.F. Schmidt and O.H. Zinke, “Application of the Quasitatic Model to the Modified Bridge,” to be published in Review of Progress in Quantitative Nondestructive Evaluation, edited by D.O. Thompson and D.E. Cimenti, Vol. 13, 1994.Google Scholar
- 4.W.F. Schmidt and O.H. Zinke, and S. Nasrazadani, “Characterization of a Crack in an Aluminum Bar Using an ac Magnetic Bridge,” accepted for an STP publication by ASTM to appear in 1994.Google Scholar