Effect of Initial Heat Treatment on DBTT of F82H Steel Irradiated by Neutrons

Wakai, Eiichi; Ando, Masami; Matsukawa, S.; Taguchi, Tomitsugu; Yamamoto, Toshio; Tomita, Hideki; Takada, Fumiki

doi:10.13182/fst05-a793

Cited by 9 publications

(8 citation statements)

References 7 publications

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“…In previous studies, DBTT of the specimens before and after irradiation was formerly examined. 43,44) A similar result of the relation between ÁDBTT to ÁYS was reported for F82H-std irradiated at 250 C to 1.9 dpa as a function of time and temperature of tempering. 42) ÁDBTT of F82H-std irradiated at 250 C tended to decrease with increasing time and temperature of tempering, and the ratios of ÁDBTT to ÁYS were in the range from 0.2 to 1.0 C/MPa as given in Fig.…”

Section: Effects Of Helium Production and Heat Treatment On Neutron Isupporting

confidence: 71%

Effects of Helium Production and Heat Treatment on Neutron Irradiation Hardening of F82H Steels Irradiated with Neutrons

Wakai¹,

Taguchi²,

Yamamoto³

et al. 2005

Mater. Trans.

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The influcence of addition of 10 B and 11 B on radiation hardening as a function of irradiation temperature was examined in reducedactivation martensitic F82H+B steels (8Cr-2W-0.2V-0.04Ta-0.1C-0.006B). Specimens used were 10 B doped, 10 B+ 11 B doped and 11 B doped F82H steels. Helium concentration produced in the specimens through 10 B(n, ) 7 Li reaction was measured from about 15 to about 330 appm. Radiation hardening of the specimens irradiated at 300 C to 2.3 dpa and 150 C to 1.9 dpa was observed. Increment of radiation hardening possibly due to helium in the specimen irradiated at 300 C tended to increase slightly with increasing helium production in tensile test at 20 C, but it was not observed for 150 C irradiation. Therefore, it can be mentioned that the enhancement of radiation hardening in the 10 B( 11 B) doped steels depends on irradiation temperature. The dependence of radiation hardening on tempering time was also examined for F82H-std irradiated at 150 C to 1.9 dpa. Increment of yield strength of F82H-std tended to increase with increasing tempering time. The relation between the shift of DBTT and the increment of yield strength due to irradiation suggest that the extension of tempering time or the increase of tempering temperature would be beneficial for mechanical properties of F82H-std.

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Section: Effects Of Helium Production and Heat Treatment On Neutron Isupporting

confidence: 71%

Effects of Helium Production and Heat Treatment on Neutron Irradiation Hardening of F82H Steels Irradiated with Neutrons

Wakai¹,

Taguchi²,

Yamamoto³

et al. 2005

Mater. Trans.

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show abstract

“…Consequently, these results indicate that micro-hardness of irradiated specimens tended to decrease by the higher temperature tempering. Effects of several tempering conditions of F82H on irradiation hardening were also reported by using JMTR irradiation at 523 K up to 2 dpa [4]. In these results, neutron irradiation hardening of F82H HT (Tempering condition: 1073 K, 0.5 h) also was largest of all specimens.…”

Section: Micro-hardness Results For Ion-irradiationsupporting

confidence: 53%

“…It is expected that the improvement of irradiation hardening might be one of effective methods to control the mechanical properties of RAF/M after irradiation. Recently, it has been reported that the tempering conditions of F82H strongly affected the void swelling and irradiation hardening behavior in F82H irradiated by ion-irradiation and neutron irradiation [3,4]. Also, it was obtained that the weld joint had less hardening than the base metal from the tensile test results of TIG weldments irradiated in HFIR [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of two-steps heat treatments on irradiation hardening in F82H irradiated at 573K

Ando

Tanigawa

Wakai

et al. 2009

Journal of Nuclear Materials

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“…The effects of the normalizing and tempering on tensile and impact behavior in martensitic steels before irradiation were reported by Schafer [8] and Gondi et al [9]. The mechanisms controlling the relationship between the changes of yield strength and shift of DBTT due to irradiation in these martensitic steels are not clear, and it is necessary to determine the effects of heat treatment on irradiation hardening and embrittlement [10][11][12]. The primary purpose of this study is to examine …”

Section: Introductionmentioning

confidence: 86%

Effect of heat treatments on tensile properties of F82H steel irradiated by neutrons

Wakai

Ando

Sawai

et al. 2007

Journal of Nuclear Materials

Self Cite

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Effect of Initial Heat Treatment on DBTT of F82H Steel Irradiated by Neutrons

Cited by 9 publications

References 7 publications

Effects of Helium Production and Heat Treatment on Neutron Irradiation Hardening of F82H Steels Irradiated with Neutrons

Effects of Helium Production and Heat Treatment on Neutron Irradiation Hardening of F82H Steels Irradiated with Neutrons

Effect of two-steps heat treatments on irradiation hardening in F82H irradiated at 573K

Effect of heat treatments on tensile properties of F82H steel irradiated by neutrons

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