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Effect of Thermal Cycling on Fracture Toughness of Hydrided Zr–2.5Nb PT Material

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Abstract

The effect of repeated thermal cycling (heating, soaking and cooling) between the room temperature and 360 °C on fracture toughness of hydrided Zr–2.5Nb pressure tube alloy was studied. The number of thermal cycles, hydrogen content and soaking time at peak temperature was varied. The fracture toughness at ambient temperature was determined for the thermally cycled material, which was higher than that of the as-hydrided samples that were not subjected to thermal cycling. It was also observed that the enhancement of fracture toughness was significant for the first thermal cycle and with further increase in number of thermal cycles, the fracture toughness values did not change much. The soaking time at peak temperature was observed to either increase or decrease the fracture toughness depending on the hydrogen concentration and presence or absence of hydrides at the peak temperature.

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Acknowledgements

The present work has been funded and sponsored by BRNS project with sanction no: 36(2)/14/14/2016-BRNS. Mr. Sushil Kumar worked on this project as a Junior Research fellow and is presently pursuing M. Tech. studies at Center for NanoScience and Engineering, Indian Institute of Science, Bengaluru-560012 Karnataka. The authors thank Dr. G. K. Dey and Dr. Madangopal Krishnan, former Directors, Materials Group, BARC and Dr. Vivekanand Kain, Director, Materials Group, BARC for their support and encouragement.

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Bhabha Atomic Research Centre,XII-N-R and D2501,Ram Niwas Singh.

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Authors and Affiliations

  1. Mechanical Metallurgy Division, Bhabha Atomic Research Center, Trombay, Mumbai, 400085, India

    T. Narayana Murty, A. K. Bind & R. N. Singh

  2. Metallurgical Engineering Department, B.I.T. Sindri, Dhanbad, Jharkhand, 828123, India

    Sushil Kumar & B. N. Roy

  3. Electromagnetic Application and Instrumentation Division, Bhabha Atomic Research Center, Trombay, Mumbai, 400085, India

    N. K. Prasad

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  1. T. Narayana Murty
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  2. Sushil Kumar
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  3. A. K. Bind
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  4. B. N. Roy
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  6. R. N. Singh
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Narayana Murty, T., Kumar, S., Bind, A.K. et al. Effect of Thermal Cycling on Fracture Toughness of Hydrided Zr–2.5Nb PT Material. Trans Indian Inst Met 76, 31–37 (2023). https://doi.org/10.1007/s12666-022-02752-w

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