STRESS CORROSION CRACKING IN TEAR DROP SPECIMENS

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Laboratory tests were conducted to investigate the stress corrosion cracking (SCC) of 304L stainless steel used to construct the containment vessels for the storage of plutonium-bearing materials. The tear drop corrosion specimens each with an autogenous weld in the center were placed in contact with moist plutonium oxide and chloride salt mixtures. Cracking was found in two of the specimens in the heat affected zone (HAZ) at the apex area. Finite element analysis was performed to simulate the specimen fabrication for determining the internal stress which caused SCC to occur. It was found that the tensile stress at the crack ... continued below

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Lam, P; Philip Zapp, P; Jonathan Duffey, J & Kerry Dunn, K May 1, 2009.

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Laboratory tests were conducted to investigate the stress corrosion cracking (SCC) of 304L stainless steel used to construct the containment vessels for the storage of plutonium-bearing materials. The tear drop corrosion specimens each with an autogenous weld in the center were placed in contact with moist plutonium oxide and chloride salt mixtures. Cracking was found in two of the specimens in the heat affected zone (HAZ) at the apex area. Finite element analysis was performed to simulate the specimen fabrication for determining the internal stress which caused SCC to occur. It was found that the tensile stress at the crack initiation site was about 30% lower than the highest stress which had been shifted to the shoulders of the specimen due to the specimen fabrication process. This finding appears to indicate that the SCC initiation took place in favor of the possibly weaker weld/base metal interface at a sufficiently high level of background stress. The base material, even subject to a higher tensile stress, was not cracked. The relieving of tensile stress due to SCC initiation and growth in the HAZ and the weld might have foreclosed the potential for cracking at the specimen shoulders where higher stress was found.

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  • 2009 ASME Pressure Vessels and Piping Division Conference

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  • Report No.: SRNL-STI-2009-00309
  • Grant Number: DE-AC09-08SR22470
  • Office of Scientific & Technical Information Report Number: 953476
  • Archival Resource Key: ark:/67531/metadc933381

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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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  • May 1, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 5:09 p.m.

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Lam, P; Philip Zapp, P; Jonathan Duffey, J & Kerry Dunn, K. STRESS CORROSION CRACKING IN TEAR DROP SPECIMENS, article, May 1, 2009; South Carolina. (digital.library.unt.edu/ark:/67531/metadc933381/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.