Boron Addition to Model Austenitic Steels and void Nucleation

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Fe-15Cr-16Ni, -0.25Ti, -500appmB, and -0.25Ti-500appmB have been irradiated in FFTF/MOTA over a wide range of dose rate which covers more than two orders difference in magnitude, within the very limited temperature range of 387-444 C. The effects of dose rate and boron addition on swelling are examined. Lower dose rates increase the swelling by shortening the incubation dose for swelling. Addition of boron does not significantly change the swelling nor the dose rate dependence of swelling for both the ternary and Ti-modified alloy. The helium pressure of cavities is found to be much smaller than the surface tension at every ... continued below

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Okita, T; Wolfer, W G; Garner, F A & Sekimura, N October 30, 2003.

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Fe-15Cr-16Ni, -0.25Ti, -500appmB, and -0.25Ti-500appmB have been irradiated in FFTF/MOTA over a wide range of dose rate which covers more than two orders difference in magnitude, within the very limited temperature range of 387-444 C. The effects of dose rate and boron addition on swelling are examined. Lower dose rates increase the swelling by shortening the incubation dose for swelling. Addition of boron does not significantly change the swelling nor the dose rate dependence of swelling for both the ternary and Ti-modified alloy. The helium pressure of cavities is found to be much smaller than the surface tension at every irradiation condition including the lowest dose and dose rate, helium generated by boron transmutant does not play any role in cavity formation in this experiment. Cavities form without helium. The difference in cavity morphology by boron addition is most likely caused by formation of borides and by lithium.

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PDF-file: 15 pages; size: 0.6 Mbytes

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  • Presented at: 11th International Conference on Fusion Reactor Materia, Kyoto, Japan, Dec 07 - Dec 12, 2003

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  • Report No.: UCRL-CONF-200801
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 15013830
  • Archival Resource Key: ark:/67531/metadc1413398

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  • October 30, 2003

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  • Jan. 23, 2019, 12:54 p.m.

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  • Jan. 30, 2019, 12:06 p.m.

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Okita, T; Wolfer, W G; Garner, F A & Sekimura, N. Boron Addition to Model Austenitic Steels and void Nucleation, article, October 30, 2003; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc1413398/: accessed May 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.