Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe

T. Toyama; Y. Nagai; Z. Tang; M. Hasegawa; T. Ohkubo; K. Hono

doi:10.4028/www.scientific.net/msf.445-446.195

Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe

T. Toyama, Y. Nagai, Z. Tang, M. Hasegawa, T. Ohkubo, K. Hono

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.

Original language	English
Title of host publication	Positron Annihilation
Subtitle of host publication	Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
Editors	Toshio Hyodo, Haruo Saito, Yoshinori Kobayashi, Yasuyuki Nagashima
Publisher	Trans Tech Publications Ltd
Pages	195-197
Number of pages	3
ISBN (Print)	9780878499366
DOIs	https://doi.org/10.4028/www.scientific.net/msf.445-446.195
Publication status	Published - 2004 Jan 1
Event	Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 - Kyoto, Japan Duration: 2003 Sep 7 → 2003 Sep 12

Publication series

Name	Materials Science Forum
Volume	445-446
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Other

Other	Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
Country	Japan
City	Kyoto
Period	03/9/7 → 03/9/12

Keywords

Irradiation Effects
Irradiation-Enhanced Precipitation
Nuclear Reactor Pressure Vessel Steels
Positron Annihilation
Three-Dimensional Atom Probe

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Toyama, T., Nagai, Y., Tang, Z., Hasegawa, M., Ohkubo, T., & Hono, K. (2004). Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe. In T. Hyodo, H. Saito, Y. Kobayashi, & Y. Nagashima (Eds.), Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 (pp. 195-197). (Materials Science Forum; Vol. 445-446). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/msf.445-446.195

Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe. / Toyama, T.; Nagai, Y.; Tang, Z.; Hasegawa, M.; Ohkubo, T.; Hono, K.

Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13. ed. / Toshio Hyodo; Haruo Saito; Yoshinori Kobayashi; Yasuyuki Nagashima. Trans Tech Publications Ltd, 2004. p. 195-197 (Materials Science Forum; Vol. 445-446).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Toyama, T , Nagai, Y, Tang, Z, Hasegawa, M, Ohkubo, T & Hono, K 2004, Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe. in T Hyodo, H Saito, Y Kobayashi & Y Nagashima (eds), Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13. Materials Science Forum, vol. 445-446, Trans Tech Publications Ltd, pp. 195-197, Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13, Kyoto, Japan, 03/9/7. https://doi.org/10.4028/www.scientific.net/msf.445-446.195

Toyama T , Nagai Y, Tang Z, Hasegawa M, Ohkubo T, Hono K. Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe. In Hyodo T, Saito H, Kobayashi Y, Nagashima Y, editors, Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13. Trans Tech Publications Ltd. 2004. p. 195-197. (Materials Science Forum). https://doi.org/10.4028/www.scientific.net/msf.445-446.195

Toyama, T. ; Nagai, Y. ; Tang, Z. ; Hasegawa, M. ; Ohkubo, T. ; Hono, K. / Irradiation-induced defects and Cu precipitates in ternary Fe-based model alloys for nuclear reactor pressure vessel steels studied by positron annihilation and 3D atom probe. Positron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13. editor / Toshio Hyodo ; Haruo Saito ; Yoshinori Kobayashi ; Yasuyuki Nagashima. Trans Tech Publications Ltd, 2004. pp. 195-197 (Materials Science Forum).

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abstract = "Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.",

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N2 - Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.

AB - Positron annihilation and three dimensional (3D) atom probe techniques are employed to study irradiation-induced defects and ultrafine Cu precipitates in model alloys for nuclear reactor pressure vessel (RPV) steels, Fe-0.3Cu-0.7Ni and Fe-0.3Cu-1.5Mn after irradiation by 3MeV electrons. The coincidence Doppler broadening (CDB) and positron lifetime clearly showed the vacancy-multi Cu atom complexes for all the alloys after irradiation. Positron annihilation revealed that the vacancies anneal out but Cu atoms aggregate to the ultrafme Cu precipitates by post-irradiation annealing at 400°C. The 3D atom probe also shows the Cu precipitate, but no enrichment of Ni or Mn atoms therein, which is consistent with the results of positron annihilation.

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