Fatigue Crack Propagation Limit Curves for S690QL and S960M High Strength Steels and their Welded Joints


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The objective of the paper is to present the newest results of our complex research work. In order to determination and comparison of the fatigue resistance, fatigue crack growth tests were performed on different grades of S690QL quenched and tempered, and S960TM thermomechanically rolled high strength steels. 15 mm and 30 mm thick base materials were used for our investigations. Welded joints were made from these base materials, using gas metal arc welding with matching, overmatching, and undermatching filler metals. In the paper, the performance of the welding experiments will be presented, especially with the difficulties of the filler material selection; along with the results of the fatigue crack growth examinations executed on the base materials and its welded joints. Statistical aspects were applied both for the presenting of the possible locations of the cracks in the base materials and the welded joints and for the processing of the measured data. Furthermore, the results will be compared with each other, and the possibility of derivation of fatigue crack propagation limit curves will be referred.



Edited by:

Nicușor Alin Sîrbu and Aurel Valentin Bîrdeanu




J. Lukács et al., "Fatigue Crack Propagation Limit Curves for S690QL and S960M High Strength Steels and their Welded Joints", Advanced Materials Research, Vol. 1146, pp. 44-56, 2018

Online since:

April 2018




* - Corresponding Author

[1] A. Balogh, J. Lukács and I. Török (Eds. ), Weldability and the properties of the welded joints, University of Miskolc, Miskolc, 2015. (In Hungarian).

[2] T. Varga, G. Szepesi and Z. Siménfalvi, Horizontal scraped surface heat exchanger – Experimental measurements and numerical analysis, Pollack Periodica: An International Journal for Engineering and Information Sciences, 12 (2017) No 1, 107-122.

DOI: https://doi.org/10.1556/606.2017.12.1.9

[3] V. Mannheim and Z. Siménfalvi, Determination of Power Consumption for Suspension Mixing in Stirring Equipments and Stirred Ball Mills, Journal of Materials Science and Engineering A, 2 (2012) No 7, 572-578.

[4] A. M. P. de Jesus et al., A comparison of the fatigue behavior between S355 and S690 steel grades, Journal of Constructional Steel Research, 79 (2012) 140–150.

DOI: https://doi.org/10.1016/j.jcsr.2012.07.021

[5] D. F. Laurito et al., Microstructural effects on fatigue crack growth behavior of a microalloyed steel, Procedia Engineering, 2 (2010) 1915–(1925).

DOI: https://doi.org/10.1016/j.proeng.2010.03.206

[6] S. Ravi, V. Balasubramanian and S. N. Nasser, Effect of mis-match ratio (MMR) on fatigue crack growth behaviour of HSLA steel welds, Engineering Failure Analysis, 11 (2004) 413-428.

DOI: https://doi.org/10.1016/j.engfailanal.2003.05.013

[7] M. Gáspár and A. Balogh, Behaviour of mismatch welded joints when undermatching filler metal is used, Production Processes and Systems, Publication of the University of Miskolc, 7 (2014) No. 1, 63-76.

[8] M. Gáspár and A. Balogh, GMAW experiments for advanced (Q+T) high strength steels, Production Processes and Systems, Publication of the University of Miskolc, 6 (2013) No. 1, 9-24.

[9] M, Gáspár, A. Balogh and I. Sas, Physical simulation aided process optimisation aimed sufficient HAZ toughness for quenched and tempered AHSS, Proceedings of the IIW 2015 International Conference: High Strength Steels - Challenges and Applications, Helsinki, Finland, 2-3 July 2015, Paper IIW 2015 1504, (2015).

[10] K. Májlinger, A. Borók, R. S. Pasquale and B. Varbai, TIG welding of advanced high strength sheets, Proceedings of the 4th International Scientific Conference on Advances in Mechanical Engineering (ISCAME 2016), 13-15 October, 2016, Debrecen, Hungary, University of Debrecen, (2016).

[11] D. M. Krahmer et al., Alternatives for Specimen Manufacturing in Tensile Testing of Steel Plates, Experimental Techniques, 40 (2016) No 6, 1555-1556.

[12] A. Suarez et al., Effects of Ultrasonics-Assisted Face Milling on Surface Integrity and Fatigue Life of Ni-Alloy 718, Journal of Materials Engineering and Performance, 25 (2016) 5076-5086.

DOI: https://doi.org/10.1007/s11665-016-2343-6

[13] ASTM E 647, Standard test method for measurement of fatigue crack growth rates (1988).

[14] P. Paris and F. Erdogan, A critical analysis of crack propagation laws, Journal of Basic Engineering, Transactions of the ASME, (1963) 528-534.

[15] D. B. Owen, Handbook of statistical tables, Vychislitel'nyjj Centr AN SSSR, Moskva, 1973. (In Russian).

[16] J. Lukács, Fatigue crack propagation limit curves for different metallic and non-metallic materials, Materials Science Forum, 414-415 (2003) 31-36.

DOI: https://doi.org/10.4028/www.scientific.net/msf.414-415.31

[17] BS 7910: Guide on methods for assessing the acceptability of flaws in fusion welded structures (1999).

[18] D. Taylor and L. Jianchun (Eds. ), Sourcebook on fatigue crack propagation: threshold and crack closure, EMAS, Warley, (1993).