Prediction of the lifetime integrity of a nuclear waste container material based on thermal stability studies

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The kinetics of precipitation in C-22 alloy (UNS N06022) was estimated through isothermal aging experiments at temperatures ranging from 427 C to 800 C for times up to 40,000 h. The phases that formed, at least after the longer aging times, were identified by transmission electron microscopy (TEM). Aged samples were also examined using scanning electron microscopy (SEM) to determine when precipitation began on grain boundaries, completely covered grain boundaries, and began forming within the grains. This data was used to evaluate the kinetics of precipitation at lower temperatures using a simple exponential temperature dependent. The corrosion resistance of aged ... continued below

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Rebak, R B; Shen, T & Summers, T July 8, 1999.

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The kinetics of precipitation in C-22 alloy (UNS N06022) was estimated through isothermal aging experiments at temperatures ranging from 427 C to 800 C for times up to 40,000 h. The phases that formed, at least after the longer aging times, were identified by transmission electron microscopy (TEM). Aged samples were also examined using scanning electron microscopy (SEM) to determine when precipitation began on grain boundaries, completely covered grain boundaries, and began forming within the grains. This data was used to evaluate the kinetics of precipitation at lower temperatures using a simple exponential temperature dependent. The corrosion resistance of aged samples was investigated using the ASTM Specification G28B technique. The time to cause a significant increase in corrosion rate was also determined as a function of temperature and was fit to an exponential temperature dependence. Preliminary results indicate that C-22 alloy base metal would remain a highly corrosion resistant, single-phase material for greater than 10,000 years at temperatures below approximately 300 C.

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1310 Kilobytes pages

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  • International Conference on Aging Studies and Lifetime Extension of Materials, Oxford (GB), 07/12/1999--07/14/1999

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  • Report No.: UCRL-JC-133423
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14473
  • Archival Resource Key: ark:/67531/metadc628047

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 8, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 2:53 p.m.

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Rebak, R B; Shen, T & Summers, T. Prediction of the lifetime integrity of a nuclear waste container material based on thermal stability studies, article, July 8, 1999; California. (digital.library.unt.edu/ark:/67531/metadc628047/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.