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Influence of Temperature and Operation Time on the Fatigue Strength and Microstructure of Welded Joints of A-387Gr.B Steel

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Materials Science Aims and scope

The main aim of our paper is to analyze the influence of temperature and service time on the fracture resistance of welded joint constituents for new and exploited low-alloyed A-387Gr.B steel (Cr–Mo type) under the action of dynamic load and changes in the mechanical properties. The exploited parent metal, as a part of the reactor mantle, is in the damage repair stage, i.e., a part of its mantle is replaced with a new material. Wohler’s curves were constructed, i.e., the fatigue strength as material resistance to crack initiation, was determined at the room and working temperatures. Testing of the welded joint and microstructural analyses of the parent metal, weld metal, and the heat-affected zones were carried out. Based on the testing results, the analysis of the fracture resistance, and the microstructural changes, represent the comparison of values obtained for the characteristic areas of the welded joint and the justification of the selected technology of welding.

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References

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Acknowledgements

Parts of this research were supported by the Ministry of Sciences and Technology of the Republic of Serbia through the Mathematical Institute SANU Belgrade Grant OI 174001 “Dynamics of Hybrid Systems with Complex Structures”. Faculty of Technical Sciences, University of Pristina in Kosovska Mitrovica.

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Authors and Affiliations

  1. University of Pristina, Faculty of Technical Sciences, Kosovska Mitrovica, Serbia

    I. Čamagić, S. Jović, S. Makragić & P. Živković

  2. Military Technical Institute, Belgrade, Serbia

    Z. Burzić

Authors
  1. I. Čamagić
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  2. S. Jović
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  3. S. Makragić
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  4. P. Živković
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  5. Z. Burzić
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Corresponding author

Correspondence to S. Jović.

Additional information

Published in Fizyko-Khimichna Mekhanika Materialiv, Vol. 57, No. 1, pp. 83–88, January–February, 2021

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Čamagić, I., Jović, S., Makragić, S. et al. Influence of Temperature and Operation Time on the Fatigue Strength and Microstructure of Welded Joints of A-387Gr.B Steel. Mater Sci 57, 86–93 (2021). https://doi.org/10.1007/s11003-021-00518-1

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  • DOI: https://doi.org/10.1007/s11003-021-00518-1

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