Influence of temperature on threshold stress for reorientation of hydrides and residual stress variation across thickness of Zr-2.5Nb alloy pressure tube

R.N. Singh, R. Lala Mikin, G.K. Dey, D.N. Sah, I.S. Batra, Per Ståhle

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41 Citations (SciVal)

Abstract

Threshold stress, σth, for reorientation of hydrides in cold worked and stress-relieved (CWSR) Zr–2.5Nb pressure tube material was determined in the temperature range of 523–673 K. Using tapered gage tensile specimen, mean value of σth was experimentally determined by two methods, half thickness method and area compensation method. The difference between local values of σth measured across the thickness of the tube and the mean σth values yielded the residual stress variation across the tube thickness. It was observed that both the mean threshold stress and residual stress decrease with increase in reorientation temperature. Also, the maximum value of residual stresses was observed near the midsection of the tube.
Original languageEnglish
Pages (from-to)208-249
JournalJournal of Nuclear Materials
Volume359
Issue number3
DOIs
Publication statusPublished - 2006

Subject classification (UKÄ)

  • Mechanical Engineering

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