Effects of annealing time on the recovery of Charpy V-notch properties of irradiated high-copper weld metal

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One of the options to mitigate the effects of irradiation on reactor pressure vessels is to thermally anneal them to restore the toughness properties that have been degraded by neutron irradiation. An important issue to be resolved is the effect on the toughness properties of reirradiating a vessel that has been annealed. This paper describes the annealing response of irradiated high-copper submerged-arc weld HSSI 73W. For this study, the weld has been annealed at 454 C (850 F) for lengths of time varying between 1 and 14 days. The Charpy V-notch 41-J (30-ft-lb) transition temperature (TT{sub 41J}) almost fully recovered ... continued below

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18 p.

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Iskander, S.K.; Sokolov, M.A. & Nanstad, R.K. December 31, 1994.

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Description

One of the options to mitigate the effects of irradiation on reactor pressure vessels is to thermally anneal them to restore the toughness properties that have been degraded by neutron irradiation. An important issue to be resolved is the effect on the toughness properties of reirradiating a vessel that has been annealed. This paper describes the annealing response of irradiated high-copper submerged-arc weld HSSI 73W. For this study, the weld has been annealed at 454 C (850 F) for lengths of time varying between 1 and 14 days. The Charpy V-notch 41-J (30-ft-lb) transition temperature (TT{sub 41J}) almost fully recovered for the longest period studied, but recovered to a lesser degree for the shorter periods. No significant recovery of the TT{sub 41J} was observed for a 7-day anneal at 343 C (650 F). At 454 C for the durations studied, the values of the upper-shelf impact energy of irradiated and annealed weld metal exceeded the values in the unirradiated condition. Similar behavior was observed after aging the unirradiated weld metal at 460 and 490 C for 1 week.

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18 p.

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INIS; OSTI as DE96010733

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  • 17. symposium on effects of radiation on materials, Sun Valley, ID (United States), 20-23 Jun 1994

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  • Other: DE96010733
  • Report No.: CONF-940657--13
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/238561 | External Link
  • Office of Scientific & Technical Information Report Number: 238561
  • Archival Resource Key: ark:/67531/metadc670774

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  • December 31, 1994

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  • June 29, 2015, 9:42 p.m.

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  • April 8, 2016, 12:33 p.m.

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Iskander, S.K.; Sokolov, M.A. & Nanstad, R.K. Effects of annealing time on the recovery of Charpy V-notch properties of irradiated high-copper weld metal, report, December 31, 1994; Tennessee. (digital.library.unt.edu/ark:/67531/metadc670774/: accessed November 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.