TO THE QUESTION OF THE METAL MAGNETIC MEMORY METHOD APPLICATION FOR STRESS-STRAINED STATE DETERMINATION OF METAL STRUCTURES
Abstract and keywords
Abstract (English):
The article considers the possibility of using the MMM method for stress-strained state determination of metal structures. The problems of MMM method physical limitations are discussed; statistical data obtained from the real objects monitoring are presented. It is concluded that it is impossible to give any opinion about the object’s state (i.e. the object has or has not defects) on the basis of the MMM method results without confirmation it by any other NDT method because just absence of magnetic anomalies does not indicate that the stress-strained state of the object is absent or low. It is shown that the "contactless magnetometric diagnostics", which uses surface signal registration from defects leakage fields and from the areas with weak local magnetic irregularities, cannot be applied for pipelines diagnostics.

Keywords:
non-destructive testing, magnetic NDT, metal magnetic memory method, stress-strain state, stress concentration zone, residual magnetization
References

1. GOST 21104-75. Kontrol´ nerazrushayushchiy. Ferrozondovyy metod [Non-destructive testing. Ferrosonde method]. Moscow, Izd-vo standartov, 1975, 7 p. (in Russ.).

2. Dubov A. A., Dubov Al. A., Kolokol´nikov S. M. Metod magnitnoy pamyati (MMP) metalla i pribory kontrolya [Metal magnetic memory method and testing devices]. Moscow, ID «Spektr», 2012, 395 p. (in Russ.).

3. Dubov A. A. Territoriya NDT [NDT Territory]. 2016, no. 2, pp. 64-68 (in Russ.).

4. Mel´guy M. A. Magnitnyy kontrol´ mekhanicheskikh svoystv staley [Magnetic inspection of steel mechanical properties]. Minsk, Nauka i tekhnika, 1980, 184 p. (in Russ.).

5. Dubov A. A. Diagnostika kotel´nykh trub s ispol´zovaniem magnitnoy pamyati metalla [Diagnostics of boiler tubes using the metal magnetic memory]. Moscow, Energoatomizdat, 1995, 112 p. (in Russ.).

6. Dubov A. A., Dubov Al. A., Kolokol´nikov S. M. Metod magnitnoy pamyati metalla i pribory kontrolya [Metal magnetic memory method and testing devices]. Moscow, Tisso, 2008, 365 p. (in Russ.).

7. Arkulis M. B., Baryshnikov M. P., Misheneva N. I. et al. Russian J. Nondestructive Testing. 2009, vol. 45, no. 8, pp. 526-529.

8. Gorkunov E. S. Russian J. Nondestructive Testing. 2014, vol. 50, no. 11, pp. 617-633.

9. Демин Е. А. Vozmozhnosti primeneniya metoda magnitnoy pamyati metalla dlya diagnostiki metallokonstruktsiy [Capabilities of the metal magnetic memory method for metal structures diagnostics]. Available in Russian at: http://td.ru/blogs/entry/Возможности-применения-метода-магнитной-памяти-металла-для-диагностики-металлоконструкций (accessed on 16.08.2016).

10. Shikunenko V. G. Experience of pipeline diagnostics with the contactless magnetometric method. Novosti teplosnabzheniya [News of Heat Supply]. 2011, no. 8(132) (in Russ.).

11. Gorkunov E. S. Different remanence states and their resistance to external effects. Discussing the so-called magnetic memory method. Insight. 2015, vol. 57, no. 12, pp. 709-717.

12. Dubov A. A. Kontrol´ kachestva litoy armatury ispol´zovaniem magnitnoy pamyati metalla [Quality control of cast fittings using metal magnetic memory]. Available in Russian at: http://www.energodiagnostika.ru/article-about-mmm-armature.html (accessed on 16.08.2016).

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