Temperature and strain-rate effects on deformation mechanisms in irradiated stainless steel

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Analysis of the deformation microstructures in ion-irradiated stainless steel shows twinning to be the predominant deformation mode at room temperature. Dislocation channelling also occurs under slow strain rate conditions. Stresses required for twinning were calculated by the model of Venables and are compatible with observed yield stresses in neutron-irradiated material if loops are the principal twin source. Computation of the expected radiation hardening from the defect structure, based on a simple model, is consistent with yield strengths measured on neutron-irradiated steels. Lower yield stresses and greater thermal energy at 288 C lessen the probability of twinning and dislocation channeling becomes … continued below

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7 p.

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Brimhall, J. L.; Cole, J. I.; Vetrano, J. S. & Bruemmer, S. M. November 1, 1994.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Analysis of the deformation microstructures in ion-irradiated stainless steel shows twinning to be the predominant deformation mode at room temperature. Dislocation channelling also occurs under slow strain rate conditions. Stresses required for twinning were calculated by the model of Venables and are compatible with observed yield stresses in neutron-irradiated material if loops are the principal twin source. Computation of the expected radiation hardening from the defect structure, based on a simple model, is consistent with yield strengths measured on neutron-irradiated steels. Lower yield stresses and greater thermal energy at 288 C lessen the probability of twinning and dislocation channeling becomes the primary deformation mode at the higher temperature. However, preliminary early results show that some twinning does occur in the irradiated stainless steel even at the higher temperature when higher strain rates are used.

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7 p.

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OSTI; NTIS; INIS; GPO Dep.

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  • Fall meeting of the Materials Research Society (MRS),Boston, MA (United States),28 Nov - 9 Dec 1994

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  • Other: DE95004941
  • Report No.: PNL-SA--25518
  • Report No.: CONF-941144--31
  • Grant Number: AC06-76RL01830
  • Office of Scientific & Technical Information Report Number: 10109044
  • Archival Resource Key: ark:/67531/metadc1274588

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  • November 1, 1994

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  • Oct. 12, 2018, 6:44 a.m.

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  • Nov. 15, 2018, 10:18 p.m.

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Brimhall, J. L.; Cole, J. I.; Vetrano, J. S. & Bruemmer, S. M. Temperature and strain-rate effects on deformation mechanisms in irradiated stainless steel, article, November 1, 1994; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1274588/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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