Mechanical properties of small size specimens of F82H steel

Wakai, Eiichi; Ohtsuka, H.; Matsukawa, S.; Furuya, Kazuo; Tanigawa, Hiroyasu; Oka, Kaori; Ohnuki, S.; Yamamoto, Toshio; Takada, Fumiki; Jitsukawa, Shiro

doi:10.1016/j.fusengdes.2005.08.072

Cited by 11 publications

(8 citation statements)

References 21 publications

(23 reference statements)

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“…The upper shelf energy of the irradiated F82H+ 11 B+N steel was hardly changed by the irradiation, but these of F82H-LN and F82H+ 11 B+N steels were reduced. The hardness and tensile behaviors of these specimens were previously examined [20,21]. The ratio of DBTT shift to irradiation hardening of F82H, F82H+ 11 B+N and F82H+ 10 B+N steels are about 0.3, 0.2 and 0.6°C/MPa, respectively, as given in Fig.…”

Section: Resultsmentioning

confidence: 99%

Reduction method of DBTT shift due to irradiation for reduced-activation ferritic/martensitic steels

Wakai

Okubo

Ando

et al. 2010

Journal of Nuclear Materials

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Section: Resultsmentioning

confidence: 99%

Reduction method of DBTT shift due to irradiation for reduced-activation ferritic/martensitic steels

Wakai

Okubo

Ando

et al. 2010

Journal of Nuclear Materials

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“…However, the use of small samples may induce a loss of constraint that can locally modify the structure and lead to apparent high toughness. There was also much attention paid to the small punch test and many correlations were established between the DBTT measured from Charpy impact data and small punch tests [118][119][120][121][122][123][124][125][126][127][128][129]. However, as shown in this work, these correlations might be biased by the loading rate.…”

Section: Data Analysis and Interpretationmentioning

confidence: 89%

Effect of irradiation-induced plastic flow localization on ductile crack resistance behavior of a 9%Cr tempered martensitic steel

Chaouadi

2008

Journal of Nuclear Materials

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“…Mao and Kameda, by observing SP test data, found that neutron irradiation significantly increases the DBTT in Fe based alloys doped with Cu [82], while Wakai et al proved that the production of helium can cause the shift of DBTT in F82H steels [83].…”

Section: Fracturementioning

confidence: 99%

The role of small specimen creep testing within a life assessment framework for high temperature power plant

Morris

Cacciapuoti

Sun

2017

International Materials Reviews

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The safe operation of components operating at high temperature and pressure faces numerous challenges associated with ageing materials and maintaining commercial viability whilst economies transition to a lower carbon future as part of their climate change commitments. Due to these challenges the plant operator faces increasing pressure to ensure that any capital or operational expenditures are optimised and must ensure that they duly recognise plant age, condition, operating regime and ultimately the planned closure date.This review, for the first time, describes how small specimen creep testing can be applied within a practical and deployable life assessment framework and in conjunction with other assessment techniques. The current state of the art for small specimen creep testing is critically reviewed; this also includes a review of traditional techniques used on site for the metallurgical assessment of material condition, with examples from site investigations and assessment campaigns in both conventional and nuclear plant applications.In order to enhance the current practice for assessing the condition of creep ageing components this review proposes the more proactive use of small specimen testing methods for the in-service condition assessment of power plant materials, notably earlier in the plant lifecycle and within a holistic life assessment framework. This is intended to provide a means of calibrating the time dependent response of the component or system being monitored, thereby providing a key reference in-service strain rate measurement, or material property evaluation, that can subsequently be used with other traditionally deployed assessment methods to define a more targeted and cost-effective forward inspection plan. The review describes how small specimen creep testing methods and other complementary tools can be use in a new and structured approach to life management.The current status of small specimen testing methods, for both conventional and nuclear applications, is described along with a detailed discussion on current practice for in-service creep life assessment, with a case study used to illustrate the main principals. A case study is presented for ageing CMV (0.5%Cr0.5%Mo0.25%V) main steam pipework due to the extensive amount of through life data available, which highlights the particular challenges associated with the interpretation of various types of site outage inspection data, in conjunction with on-load plant operational data. The current approach to the assessment of component condition follows well established inspection based practices defined in various industry good practice guides, with expert elicitation and experience used to judge the condition of the component, system and operational risk on return to service.This review proposes a new approach to the holistic life assessment of high temperature plant, with a particular emphasis on more proactive use of small specimen testing. In addition, the review has 2 highlighted other aspects of the current approach to in-...

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Mechanical properties of small size specimens of F82H steel

Cited by 11 publications

References 21 publications

Reduction method of DBTT shift due to irradiation for reduced-activation ferritic/martensitic steels

Reduction method of DBTT shift due to irradiation for reduced-activation ferritic/martensitic steels

Effect of irradiation-induced plastic flow localization on ductile crack resistance behavior of a 9%Cr tempered martensitic steel

The role of small specimen creep testing within a life assessment framework for high temperature power plant

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