Professional paper

Metal Magnetic Memory (MMM) Method for Non-Destructive Testing and Early Diagnostics of Degradation Processes and Comparison with Ultrasonic Inspection, a Representative of a Classical Non-Destructive Testing Method

Fran Jarnjak ; HRID – Non destructive testing d.o.o., Zagreb, Hrvatska

Abstract

This paper presents a Metal Magnetic Memory (MMM) method to inspect welds and base metal, which is standardized as per ISO 24497. MMM method is used to find stress concentration zones on the test object, them being locations where defects would be either already present or most likely to start occurring even before they can be confirmed with the conventional NDT methods. MMM method and its results are compared with the conventional ultrasonic (UT) testing method on weld samples, where a quite good correlation between their results is confirmed.

Keywords

metal magnetic memory; early diagonostics; ISO 24497; stress concentration zones

Hrčak ID:

170435

URI

https://hrcak.srce.hr/170435

Publication date:

29.12.2016.

Article data in other languages: croatian

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