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INFLUENCE OF ULTRASONIC IMPACT TREATMENT ON THE FATIGUE SAFETY COEFFICIENTS OF WELDED JOINTS OF THE STRENX 700MC STEEL
Authors:
Daniel Varecha1
, Otakar Bokůvka2, Libor Trško3, Martin Vicen2, Ružica R. Nikolić3
1University of Žilina, Faculty of Mechnaical Engineering, Department of Design and Mechanical Elements, Slovakia
2University of Žilina, Faculty of Mechnaical Engineering, Department of Materials Engineering, Slovakia
3University of Žilina, Research Center, Slovakia
Received: 14.07.2020.
Accepted: 26.08.2020.
Available: 30.09.2020.
Abstract:
Research results of influence of the UIT (Ultrasonic Impact Treatment) on welded joints, executed on the Strenx 700MC steel, are presented in this paper. The fatigue tests of those joints were performed by rotating bending in the region of the high number of loading cycles (105 to 107 ) with parameters: frequency 35 Hz, cycles asymmetry factor – 1, at the ambient temperature 20 ± 2 °C. The fatigue safety coefficient was calculated before the UIT (in the original state) and after the UIT, according to four methods. An increase was recorded for the latter state: for the Goodman method of 10.45 %, for the Gerber method of 10.21 %, for the ASME method of 5.96 % and for the Soderberg method of 7.40%.
Keywords:
Strenx 700 MC steel, highcycles fatigue, safety coefficients
References:
[1] O. Bokůvka, G. Nicoletto, L. Kunz, P. Palček, M. Chalupova, Low and High Frequency Fatigue Testing, EDIS ŽU Žilina, 2002.
[2] O. Bokůvka, G. Nicoletto, M. Guagliano, L. Kunz, P. Palček, F. Nový, M. Chalupová, Fatigue of Materials at Low and High Frequency Loading EDIS ŽU Žilina, 2014.
[3] P. Kopas, F. Nový, Fatigue Life of Structural Steels with Increased Strength Limit, GEORG Žilina, (In Slovak), 2018.
[4] F. Nový, M. Chalupová, M. Činčala, O. Bokůvka, Influence of Surface Quality on the Fatigue Crack Initiation. Acta Mechanica Slovaca, 12 (4-B), 2008: 209-214.
[5] Y. Murakami, Metal Fatigue Effect of Small Defect and Nonmetallic Inclusions, Elsevier, Oxford, 2002.
[6] A. Vaško, J. Belan, L. Kuchariková, E. Tillová, Low and High Frequency Test of Nodular Cast Iron. Metalurgija – Metallurgy, 56 (1-2), 2017: 25-28. https://hrcak.srce.hr/168845
[7] P. Skočovský, O. Bokůvka, R. Konečná, E. Tillová, Material Science, EDIS ŽU Žilina, (In Slovak), 2014.
[8] M. Holzmann, M. Klesnil, Brittle and Fatigue Fracture of Materials and Construction, SNTL Prague, (In Czech), 1972.
[9] L. Trško, O. Bokůvka, M. Jambor, f. Nový, A. Bača, Z. Florková, High and Ultra-high Cycle Fatigue of C55 High Grade Carbon Steel. Applied Engineering Letters, 1 (4), 2016: 111- 114.
[10] S. Baiker, Shot Peening – A Dynamic Application and Its Future, MFN Publishing, Wetzikon, Mumbai, 2012.
[11] L. Trško, O. Bokůvka, M. Guagliano, F., Nový, Effect of Severe Shot Peening on Ultra-high Cycle Fatigue of Low-Alloy Steel. Material and Design, 57, 2014: 103-113. https://doi.org/10.1016/j.matdes.2013.12.035
[12] L. Trško, M. Guagliano, O. Bokůvka, F. Nový, Fatigue Life of AW7075 Aluminium Alloy after Sever Shot Peening Treatment with Different Intensities. Procedia Engineering, 74, 2014: 246-252. https://doi.org/10.1016/j.proeng.2014.06.257
[13] L. Trško, M. Guagliano, P. Lukáš, O. Bokůvka, F. Nový, Effects of Severe Shot Peening on the Surface State of AW7075 Al Alloy. Kovové materiály – Metalic Materials, 53 (4), 2015: 239-243. https://doi.org/10.4149/km_2015_4_239
[14] D. Závodská, M. Guagliano, O. Bokůvka, L. Trško, Effect of Shot Peening on the Fatigue Properties of 40NiCrMo7 Steel. Manufacturing Technology, 16 (1), 2016: 295-299. https://doi.org/10.21062/ujep/x.2016/a/1213-2489/MT/16/1/295
[15] L. Trško, S. Fintová, F. Nový, O. Bokůvka, M. Jambor, F. Pastorek, Z. Florková, M. Oravcová, Study of Relation Between Shot Peening Parameters and Fatigue Fracture Surface Character of an AW7075 Aluminium Alloy. Metals, 8 (2), 2018: 111. https://doi.org/10.3390/met8020111
[16] P. Skočovský, P. Palček, R. Konečná, L. Várkoly, Construction of Materials, EDIS ŽU Žilina, (In Slovak), 2000.
[17] J. Meško, J. Veselko, Welding and Repair of Graphitic Cast Iron, EDIS ŽU Žilina, (In Slovak), 1999.
[18] I. Hrivňák, Theory of Weldability and Alloys, SAV Bratislava, (In Slovak), 1989.
[19] F. Nový, R. Ulewicz, O. Bokůvka, L. Trško, J. Lago, Reliability and Safety of Structural Elements in the Gigacycle Region of Loading. Communications – Scientific Letters of the University of Žilina, 20 (3), 2016: 15-18.
[20] R. Ulewicz, M. Mazur, Fatigue Testing of Structural Steels as a Factor of Safety of Technical Facilities Maintenance. Production Engineering Archives, 1 (1), 2013: 32-34.
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
Volume 10
Number 3
September 2025
Last Edition
Volume 10
Number 3
September 2025
How to Cite
D. Varecha, O. Bokůvka, L. Trško, M. Vicen, R.R. Nikolić, Influence of Ultrasonic Impact Treatment on the Fatigue Safety Coefficients of Welded Joints of the Strenx 700MC Steel. Applied Engineering Letters, 5(3), 2020: 75–79.
https://doi.org/10.18485/aeletters.2020.5.3.1
More Citation Formats
Varecha, D., Bokůvka, O., Trško, L., Vicen, M., & Nikolić, R. R. (2020). Influence of Ultrasonic Impact Treatment on the Fatigue Safety Coefficients of Welded Joints of the Strenx 700MC Steel. Applied Engineering Letters, 5(3), 75–79. https://doi.org/10.18485/aeletters.2020.5.3.1
Varecha, Daniel, et al. “Influence of Ultrasonic Impact Treatment on the Fatigue Safety Coefficients of Welded Joints of the Strenx 700MC Steel.” Applied Engineering Letters, vol. 5, no. 3, 2020, pp. 75–79, https://doi.org/10.18485/aeletters.2020.5.3.1.
Varecha, Daniel, Otakar Bokůvka, Libor Trško, Martin Vicen, and Ružica R. Nikolić. 2020. “Influence of Ultrasonic Impact Treatment on the Fatigue Safety Coefficients of Welded Joints of the Strenx 700MC Steel.” Applied Engineering Letters 5 (3): 75–79. https://doi.org/10.18485/aeletters.2020.5.3.1.
Varecha, D., Bokůvka, O., Trško, L., Vicen, M. and Nikolić, R.R. (2020). Influence of Ultrasonic Impact Treatment on the Fatigue Safety Coefficients of Welded Joints of the Strenx 700MC Steel. Applied Engineering Letters, 5(3), pp.75–79. doi:10.18485/aeletters.2020.5.3.1.
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INFLUENCE OF ULTRASONIC IMPACT TREATMENT ON THE FATIGUE SAFETY COEFFICIENTS OF WELDED JOINTS OF THE STRENX 700MC STEEL
Authors:
Daniel Varecha1
, Otakar Bokůvka2, Libor Trško3, Martin Vicen2, Ružica R. Nikolić3
1University of Žilina, Faculty of Mechnaical Engineering, Department of Design and Mechanical Elements, Slovakia
2University of Žilina, Faculty of Mechnaical Engineering, Department of Materials Engineering, Slovakia
3University of Žilina, Research Center, Slovakia
Received: 14.07.2020.
Accepted: 26.08.2020.
Available: 30.09.2020.
Abstract:
Research results of influence of the UIT (Ultrasonic Impact Treatment) on welded joints, executed on the Strenx 700MC steel, are presented in this paper. The fatigue tests of those joints were performed by rotating bending in the region of the high number of loading cycles (105 to 107 ) with parameters: frequency 35 Hz, cycles asymmetry factor – 1, at the ambient temperature 20 ± 2 °C. The fatigue safety coefficient was calculated before the UIT (in the original state) and after the UIT, according to four methods. An increase was recorded for the latter state: for the Goodman method of 10.45 %, for the Gerber method of 10.21 %, for the ASME method of 5.96 % and for the Soderberg method of 7.40%.
Keywords:
Strenx 700 MC steel, highcycles fatigue, safety coefficients
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)
Volume 10
Number 3
September 2025
Last Edition
Volume 10
Number 3
September 2025