Effect of test temperature and load ratio on hydride cracking rate of Zr-2.5Nb alloy

Authors

  • A. Grybenas
  • V. Makarevicius
  • G. Dundulis

Abstract

Delayed hydride cracking (DHC) rate in Zr-2.5Nb pressure tube material was determined under different temperature and loading conditions. Test specimens con-taining hydrogen were manufactured from RBMK (TMT-1) and CANDU pressure tube materials, depositing hydride layer and homogenizing it at elevated temperatures to the required hydrogen concentration.
Delayed hydride cracking rates at constant load-ing were measured at 144, 250 and 283°C.
Cycle loading tests were done at 250°C. Loading frequency was 1 cycle/min with different mini-mum/maximum load ratio R, changing from 0.13 to 1. It was determined that with the decrease of load ratio R, DHC rate increases up to 7 times, from 3.2·10-8 m/s to 4.8·10-9 m/s.

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Published

2007-02-14

Issue

Vol. 63 No. 1 (2007)

Section

Articles

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The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).