NDTnet 1998 Aug, Vol.3 No.8

Full-Text - Abstract

Frequency domain evaluation of eddy current signals (harmonic analysis) in ferro- magnetic materials has been introduced in the last years as an industrial tool for materials characterization and proved to be a reliable and cost effective alternative to traditional techniques of quality control (metalography, mechanical tests, etc.).

In this paper the harmonic analysis is applied to nodular cast iron materials to characterize and to evaluate the technique performance in predicting their metallurgical and mechanical properties. The samples were first characterized metalographically and by mechanical tests to a quantitative determination of their microstructrual parameters (graphite nodules and pearlite/ferrite ratio of the matrix) and their mechanical properties (tensile strength, yield strength and hardness) respectively. This mechanical and metallurgical parameter were found to have a very good correlation with the harmonic analysis parameters measured in the same samples, showing reliable industrial applicability of the technique.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

Publication Contact:
7th ECNDT, Park Alle 345, DK-2605 Broendby, Denmark, Fax: +45 46 26 70 11, Email: 101373.3414@compuserve.com