Effects of phosphorus on defect behavior, solute segregation and void swelling in electron irradiated FeCrNi alloys

Hideo Watanabe, A. Aoki, H. Murakami, T. Muroga, N. Yoshida

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Interstitial loop formation and void swelling under electron irradiation have been observed with a HVEM in pure Fe-15Cr-(13 to 28)Ni and Fe-16Cr-17Ni-(0.024 to 0.1)P alloys at temperatures between 293 and 873 K. After irradiations, microchemical changes at the void surfaces and matrices were analyzed by EDS. At temperatures below 573 K, where the effect of long range migration of vacancies is negligibly small, the interstitial loop density in FeCrNiP alloys was considerably higher than that in pure FeCrNi ternaries. This indicates that the addition of phosphorus significantly influences the nucleation of interstitial loops at these temperatures. From the temperature dependence of the loop density, an interstitial-phosphorus binding energy of 0.5 eV was derived. At temperatures above 573 K void swelling or vacancy loop formation is prominent and shifted upward by 100 K. Moreover, solute (Ni) segregation to the void surface and matrix were suppressed by phosphorus addition. Such phenomena are thought to be the result of vacancy-phosphorus interaction.

Original languageEnglish
Pages (from-to)815-822
Number of pages8
JournalJournal of Nuclear Materials
Volume155-157
Issue numberPART 2
DOIs
Publication statusPublished - Jul 2 1988

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swelling
Phosphorus
Swelling
phosphorus
voids
solutes
interstitials
Defects
Electrons
defects
Vacancies
electrons
Temperature
Electron irradiation
temperature
electron irradiation
matrices
Binding energy
Energy dispersive spectroscopy
Nucleation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)

Cite this

Effects of phosphorus on defect behavior, solute segregation and void swelling in electron irradiated FeCrNi alloys. / Watanabe, Hideo; Aoki, A.; Murakami, H.; Muroga, T.; Yoshida, N.

In: Journal of Nuclear Materials, Vol. 155-157, No. PART 2, 02.07.1988, p. 815-822.

Research output: Contribution to journalArticle

Watanabe, Hideo ; Aoki, A. ; Murakami, H. ; Muroga, T. ; Yoshida, N. / Effects of phosphorus on defect behavior, solute segregation and void swelling in electron irradiated FeCrNi alloys. In: Journal of Nuclear Materials. 1988 ; Vol. 155-157, No. PART 2. pp. 815-822.
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N2 - Interstitial loop formation and void swelling under electron irradiation have been observed with a HVEM in pure Fe-15Cr-(13 to 28)Ni and Fe-16Cr-17Ni-(0.024 to 0.1)P alloys at temperatures between 293 and 873 K. After irradiations, microchemical changes at the void surfaces and matrices were analyzed by EDS. At temperatures below 573 K, where the effect of long range migration of vacancies is negligibly small, the interstitial loop density in FeCrNiP alloys was considerably higher than that in pure FeCrNi ternaries. This indicates that the addition of phosphorus significantly influences the nucleation of interstitial loops at these temperatures. From the temperature dependence of the loop density, an interstitial-phosphorus binding energy of 0.5 eV was derived. At temperatures above 573 K void swelling or vacancy loop formation is prominent and shifted upward by 100 K. Moreover, solute (Ni) segregation to the void surface and matrix were suppressed by phosphorus addition. Such phenomena are thought to be the result of vacancy-phosphorus interaction.

AB - Interstitial loop formation and void swelling under electron irradiation have been observed with a HVEM in pure Fe-15Cr-(13 to 28)Ni and Fe-16Cr-17Ni-(0.024 to 0.1)P alloys at temperatures between 293 and 873 K. After irradiations, microchemical changes at the void surfaces and matrices were analyzed by EDS. At temperatures below 573 K, where the effect of long range migration of vacancies is negligibly small, the interstitial loop density in FeCrNiP alloys was considerably higher than that in pure FeCrNi ternaries. This indicates that the addition of phosphorus significantly influences the nucleation of interstitial loops at these temperatures. From the temperature dependence of the loop density, an interstitial-phosphorus binding energy of 0.5 eV was derived. At temperatures above 573 K void swelling or vacancy loop formation is prominent and shifted upward by 100 K. Moreover, solute (Ni) segregation to the void surface and matrix were suppressed by phosphorus addition. Such phenomena are thought to be the result of vacancy-phosphorus interaction.

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