Determination of Welding Residual Stresses with Help of the Micromagnetic Measurement Method

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The micromagnetic measurement method is a well known technique for a qualitative estimation of residual stresses in ferromagnetic materials. The application due to the advantages of a fast and manageable use is hindered by the high complexity of the calibration procedure for the quantitative residual stress determination when additionally a changing microstructure influences the measured signals. Therefore basic investigations were performed for the residual stress determination of welded joints by the micromagnetic method. A multi-parameter approach by using different micromagnetic techniques was evaluated by a linear regression analysis. For each structural steel a regression polynomial can be calculated for the residual stress determination of differently welded specimens. The accuracy of the prediction depends on the magnetization direction. The experimental results show, that this strategy enables a useful possibility of an easier method for the determination of residual stresses in welded joints.

Info:

Periodical:

Materials Science Forum (Volumes 524-525)

Edited by:

W. Reimers and S. Quander

Pages:

647-652

DOI:

10.4028/www.scientific.net/MSF.524-525.647

Citation:

M. Bruns and T. Nitschke-Pagel, "Determination of Welding Residual Stresses with Help of the Micromagnetic Measurement Method", Materials Science Forum, Vols. 524-525, pp. 647-652, 2006

Online since:

September 2006

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$35.00

[1] M.J.M. Hermans, E.M. van der Aa, R.R.G.M. Pieters, A.S. Wojtas: Barkhausen Noise Measurements for Residual Stress Analysis in Welded Dual Phase Steel - the influence of active cooling during welding. Proceedings of the 5 th International Conference on Barkhausen Noise and Micromagnetic Testing, pp.101-111.

[2] L.P. Karjalainen, M. Moilanen, R. Rautioaho: Evaluating the residual stresses in welding from Barkhausen noise measurements. Materialprüfung, Band 22 (1980) Heft 5, pp.196-200.

[3] B. Augustyniak, M. Chmielewski, T. Skibinski, D. Mezyk, M. Jaworski, J Laska: Complementary studies of Residual Stress Distribution of Repaired Power Plant Steam Turbine Casing. Proceedings of the 5 th International Conference on Barkhausen Noise and Micromagnetic Testing, pp.113-122.

[4] DIN EN 10027-1 (2005-10): Bezeichnungssyteme für Stähle - Teil 1.

[5] W.A. Theiner, R. Kern, I. Lejeune, R. Meyer: Grundlegende Untersuchungen zur orts- und zeitaufgelösten zerstörungsfreien Bestimmung mikrostruktureller Eigenschaften. DVS-Berichte, Band 205 (1999).

[6] Hauk, V., Macherauch, E.: Die Zweckmäßige Durchführung röntgenographischer Spannungsermittlungen (RSE). HTM-Beiheft: Eigenspannungen und Lastspannungen. Edt. V. Hauk and E. Macherauch, Hanser, 1982, 1-19.

[7] N.R. Draper, H. Smith: Applied Regression Analysis. New York, Wiley, (1966).

[8] Th. Nitschke-Pagel: Eigenspannungen und Schwingfestigkeitsverhalten geschweißter Feinkornbaustähle. Diss. TU Braunschweig (1994).

[9] M. Bruns, Th. Nitschke-Pagel, H. Eslami-Chalander, K. Dilger: Determination of Residual Stresses in Steel Weldments by Micromagnetic Measurements. Proceedings of the 5 th International Conference on Barkhausen Noise and Micromagnetic Testing, pp.47-57.

DOI: 10.4028/www.scientific.net/msf.681.194

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