The precipitation behavior of ion irradiated V-4Cr-4Ti alloys at various oxygen and nitrogen levels

M. Hatakeyama, Hideo Watanabe, T. Muroga, N. Yoshida

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

NIFS HEAT-1 and nine types of the V-4Cr-4Ti model alloys with different oxygen and nitrogen concentrations were irradiated with 2.4 MeV Cu2+ ions at 973 K up to doses of 3 dpa. Oxygen concentrations were 44-921 wppm and nitrogen concentrations were 11-1070 wppm, respectively. Fine Ti(O,N,C) precipitates were observed in all specimens. In low oxygen content specimens (<50 wppm), the number density of precipitates was lower than that of high content specimens. This was because the nucleation of precipitates, which resulted in irradiation hardening, was suppressed, especially on low damage level. On the other hand, nitrogen enhanced the hardening especially at low concentration. The total amounts of oxygen in precipitates, which were estimated from the density and size of precipitates at 0.75 and 3 dpa, were higher than that of matrix level before irradiation. The result suggests that oxygen diffuses from vacuum and other regions of the specimen to the irradiated region.

Original languageEnglish
Pages (from-to)420-424
Number of pages5
JournalJournal of Nuclear Materials
Volume329-333
Issue number1-3 PART A
DOIs
Publication statusPublished - Aug 1 2004
EventProceedings of the 11th Conference on Fusion Research - Kyoto, Japan
Duration: Dec 7 2003Dec 12 2003

Fingerprint

Precipitates
precipitates
Nitrogen
Ions
Oxygen
nitrogen
oxygen
ions
hardening
Hardening
Irradiation
irradiation
low concentrations
Nucleation
nucleation
Vacuum
damage
dosage
vacuum
matrices

All Science Journal Classification (ASJC) codes

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

Cite this

The precipitation behavior of ion irradiated V-4Cr-4Ti alloys at various oxygen and nitrogen levels. / Hatakeyama, M.; Watanabe, Hideo; Muroga, T.; Yoshida, N.

In: Journal of Nuclear Materials, Vol. 329-333, No. 1-3 PART A, 01.08.2004, p. 420-424.

Research output: Contribution to journalConference article

Hatakeyama, M. ; Watanabe, Hideo ; Muroga, T. ; Yoshida, N. / The precipitation behavior of ion irradiated V-4Cr-4Ti alloys at various oxygen and nitrogen levels. In: Journal of Nuclear Materials. 2004 ; Vol. 329-333, No. 1-3 PART A. pp. 420-424.
@article{cca91f80050b4b789cf35a651b697966,
title = "The precipitation behavior of ion irradiated V-4Cr-4Ti alloys at various oxygen and nitrogen levels",
abstract = "NIFS HEAT-1 and nine types of the V-4Cr-4Ti model alloys with different oxygen and nitrogen concentrations were irradiated with 2.4 MeV Cu2+ ions at 973 K up to doses of 3 dpa. Oxygen concentrations were 44-921 wppm and nitrogen concentrations were 11-1070 wppm, respectively. Fine Ti(O,N,C) precipitates were observed in all specimens. In low oxygen content specimens (<50 wppm), the number density of precipitates was lower than that of high content specimens. This was because the nucleation of precipitates, which resulted in irradiation hardening, was suppressed, especially on low damage level. On the other hand, nitrogen enhanced the hardening especially at low concentration. The total amounts of oxygen in precipitates, which were estimated from the density and size of precipitates at 0.75 and 3 dpa, were higher than that of matrix level before irradiation. The result suggests that oxygen diffuses from vacuum and other regions of the specimen to the irradiated region.",
author = "M. Hatakeyama and Hideo Watanabe and T. Muroga and N. Yoshida",
year = "2004",
month = "8",
day = "1",
doi = "10.1016/j.jnucmat.2004.04.076",
language = "English",
volume = "329-333",
pages = "420--424",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "1-3 PART A",

}

TY - JOUR

T1 - The precipitation behavior of ion irradiated V-4Cr-4Ti alloys at various oxygen and nitrogen levels

AU - Hatakeyama, M.

AU - Watanabe, Hideo

AU - Muroga, T.

AU - Yoshida, N.

PY - 2004/8/1

Y1 - 2004/8/1

N2 - NIFS HEAT-1 and nine types of the V-4Cr-4Ti model alloys with different oxygen and nitrogen concentrations were irradiated with 2.4 MeV Cu2+ ions at 973 K up to doses of 3 dpa. Oxygen concentrations were 44-921 wppm and nitrogen concentrations were 11-1070 wppm, respectively. Fine Ti(O,N,C) precipitates were observed in all specimens. In low oxygen content specimens (<50 wppm), the number density of precipitates was lower than that of high content specimens. This was because the nucleation of precipitates, which resulted in irradiation hardening, was suppressed, especially on low damage level. On the other hand, nitrogen enhanced the hardening especially at low concentration. The total amounts of oxygen in precipitates, which were estimated from the density and size of precipitates at 0.75 and 3 dpa, were higher than that of matrix level before irradiation. The result suggests that oxygen diffuses from vacuum and other regions of the specimen to the irradiated region.

AB - NIFS HEAT-1 and nine types of the V-4Cr-4Ti model alloys with different oxygen and nitrogen concentrations were irradiated with 2.4 MeV Cu2+ ions at 973 K up to doses of 3 dpa. Oxygen concentrations were 44-921 wppm and nitrogen concentrations were 11-1070 wppm, respectively. Fine Ti(O,N,C) precipitates were observed in all specimens. In low oxygen content specimens (<50 wppm), the number density of precipitates was lower than that of high content specimens. This was because the nucleation of precipitates, which resulted in irradiation hardening, was suppressed, especially on low damage level. On the other hand, nitrogen enhanced the hardening especially at low concentration. The total amounts of oxygen in precipitates, which were estimated from the density and size of precipitates at 0.75 and 3 dpa, were higher than that of matrix level before irradiation. The result suggests that oxygen diffuses from vacuum and other regions of the specimen to the irradiated region.

UR - http://www.scopus.com/inward/record.url?scp=3343000449&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3343000449&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2004.04.076

DO - 10.1016/j.jnucmat.2004.04.076

M3 - Conference article

AN - SCOPUS:3343000449

VL - 329-333

SP - 420

EP - 424

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-3 PART A

ER -