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Effect of irradiation on failure mode during creep

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Abstract

In-reactor stress to rupture results in excess of 11,000 hours are reported. Stress rupture properties during in-reactor testing of AISI 316 CW were demonstrated to be greater than or equal to the unirradiated material properties. Failure strains of the pressurized tube specimens were found to be stress dependent with a minimum in failure strain occurring at 200 MPa for unirradiated tests. Higher failure strains at lower stresses resulted from a transition in crack propagation mechanisms from triple point wedge cracking to grain boundary cavitation. The triple point cracking to cavitation transition was shifted to lower stresses by irradiation.

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Authors and Affiliations

  1. Pacific Northwest Laboratory, P.O. Box 999, 99352, Richland, WA

    E. R. Gilbert (Staff Scientist)

  2. Auburn University, USA

    B. A. Chin (Alumni Professor)

  3. Rockwell Hanford Operations, USA

    D. R. Duncan (Senior Engineer)

Authors
  1. E. R. Gilbert
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  2. B. A. Chin
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  3. D. R. Duncan
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Formerly with Westinghouse Hanford Company

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Gilbert, E.R., Chin, B.A. & Duncan, D.R. Effect of irradiation on failure mode during creep. Metall Trans A 18, 79–84 (1987). https://doi.org/10.1007/BF02646224

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  • DOI: https://doi.org/10.1007/BF02646224

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