Primary water stress corrosion cracking of Alloy 600: Effects of processing parameters

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Correlations of stress corrosion cracking (SCC) data in deaerated water with temperature, stress, metallography, and processing for laboratory test specimens are presented. Initiation time data show that a low temperature anneal and resulting absence of grain boundary carbides result in a material having increased susceptibility to SCC. Data also show that hot worked and annealed Alloy 600 is more resistant than cold worked and annealed material, both having carbide decorated grain boundaries. In absence of grain boundary carbides, both materials are equally susceptible. Low temperature thermal treatment (1100F) reduces SCC susceptibility with or without grain boundary decoration. Weld metal data ... continued below

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13 p.

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Seman, D. J.; Webb, G. L. & Parrington, R. J. October 22, 1993.

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Description

Correlations of stress corrosion cracking (SCC) data in deaerated water with temperature, stress, metallography, and processing for laboratory test specimens are presented. Initiation time data show that a low temperature anneal and resulting absence of grain boundary carbides result in a material having increased susceptibility to SCC. Data also show that hot worked and annealed Alloy 600 is more resistant than cold worked and annealed material, both having carbide decorated grain boundaries. In absence of grain boundary carbides, both materials are equally susceptible. Low temperature thermal treatment (1100F) reduces SCC susceptibility with or without grain boundary decoration. Weld metal data and data correlations developed from 700 double U-bends are presented. Data demonstrate the effect of increased carbon content to improve SCC resistance. The data shows that the general relation of time, temperature and strain for wrought material is followed for the weld metal. The weld process used did not affect the SCC susceptibility of EN-82 which showed a greater resistance to SCC than EN-62. Stress relief of weld deposits showed an improvement for wrought material. Heat affected zone resistance was improved if the starting material received a high temperature anneal (1850 to 2000F). Range of SCC initiation times for weld metal is comparable to the range of initiation times for wrought material.

Physical Description

13 p.

Notes

INIS; OSTI as DE94001760; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

Source

  • Workshop on primary water stress corrosion cracking (PWSCC) of alloy 600 in PWRs,Charlotte, NC (United States),9-11 Oct 1991

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  • Other: DE94001760
  • Report No.: WAPD-T--2972
  • Report No.: CONF-9110406--1
  • Grant Number: AC11-93PN38195
  • Office of Scientific & Technical Information Report Number: 10190553
  • Archival Resource Key: ark:/67531/metadc1400510

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  • October 22, 1993

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  • Jan. 12, 2019, 4:41 p.m.

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Seman, D. J.; Webb, G. L. & Parrington, R. J. Primary water stress corrosion cracking of Alloy 600: Effects of processing parameters, article, October 22, 1993; United States. (https://digital.library.unt.edu/ark:/67531/metadc1400510/: accessed March 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.