Abstract
Zr-2.5Nb alloy tubes in cold worked and stress relieved (CWSR) condition serve as pressure boundary for hot coolant in Indian Pressurized Heavy Water Reactor (IPHWR). Due to both microstructural and crystallographic anisotropy, the mechanical properties in general and fracture behavior in particular are anisotropic for this material/component. In this work impact behavior of the pressure tube material was characterized over a range of temperature by impact test using specimens with crack growth direction along axial and transverse directions of the tubes. It has been found that both temperature and orientation have strong influence on the absorbed impact energy.
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References
Lemaignan C and Motta A T, Zirconium alloys in nuclear applications, Materials Science & Techno. A Comprehensive treatment, eds. Cahn R W, Haasen P and Kramer E J, 10B chapter 7, (1994) 1.
Dubey J S, Chakravartty J K and Banerjee S, Fracture Behaviour of Dilute Zirconium Alloys: Role of Hydrogen and Trace Impurities, Paper no. 50483, Proceedings of 13th. International Conference on Nuclear Engineering (ICONE-13, ASME) Bejing, China, May 16–20, (2005).
Singh R N, Mukherjee S, Anuja Gupta and Banerjee S, Terminal Solid Solubility of Hydrogen in Zr-alloy Pressure Tube Materials, Journal of Alloys and Compounds, 389 (2005) 102.
Singh R N, Lala Mikin R, Dey G K, Sah D N, Batra I S and Ståhle P, Influence of temperature on threshold stress for reorientation of hydrides and residual stress variation across thickness of Zr-2.5Nb alloy pressure tube, Journal of Nuclear Materials, 359 (2006) 208.
Singh R N, Kishore R, Singh S S, Sinha T K and Kashyap B P, Stress-reorientation of hydrides and hydride embrittlement of Zr-2.5 wt. % Nb pressure tube alloy, Journal of Nuclear Materials 325 (2004) 26.
Singh R N, PhD Thesis, Indian Institute of Technology, Mumbai, India, 2002
Viswanathan U K, Singh R N, Basak C N, Anantharaman S and Sahoo K C, Evaluation of effect of hydrogen on toughness of Zircaloy-2 by instrumented drop weight impact testing, Journal of Nuclear Materials, 350 (2006) 310.
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Shah, P.K., Satheesh, P.M., Singh, R.N. et al. Anisotropy in impact behavior of Zr-2.5Nb pressure tube alloy. Trans Indian Inst Met 64, 67 (2011). https://doi.org/10.1007/s12666-011-0013-9
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DOI: https://doi.org/10.1007/s12666-011-0013-9