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Creep-Fatigue Interaction on Estimation of Lifetime and Fatigue Damage of F82H
https://repo.qst.go.jp/records/80558
https://repo.qst.go.jp/records/805582f0b732e-94ee-47f8-b4cb-8ed0c95fc5aa
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-09-28 | |||||
| タイトル | ||||||
| タイトル | Creep-Fatigue Interaction on Estimation of Lifetime and Fatigue Damage of F82H | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Guan, Wenhai
× Guan, Wenhai× Gwon, Hyoson× Hirose, Takanori× Tanigawa, Hisashi× Kawamura, Yoshinori× Nakajima, Motoki× Nozawa, Takashi× Itoh, Takamoto× Guan, Wenhai× Gwon, Hyoson× Hirose, Takanori× Tanigawa, Hisashi× Kawamura, Yoshinori× Nakajima, Motoki× Nozawa, Takashi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Reduced activation ferritic/martensitic steel of F82H is being developed by National Institutes for Quantum and Radiological Science and Technology and considered as primary candidate material for the application to TBM and DEMO blanket. From the viewpoint of structural integrity, creep-fatigue (CF) damages of F82H should be studied since the blanket is cyclically loaded with pressure, heat load and electromagnetic force at elevated temperatures including creep field. In this study, CF damage of F82H at 550°C in air was investigated. Especially, impact of CF interaction on fatigue damage and CF lifetime was quantitatively evaluated. A NT (normalizing and tempering: 1040 °C × 40 min/air cooling + 750 °C × 60 min/air cooling) F82H plate was used in this study. Round bar specimen machined from the plate along the rolling direction with a gauge section of φ5 mm × 12 mm referred from ASTM E2714-13 was used. Tension-compression tests at 550 °C in air were conducted with the strain rate of 10–1 %/s. The total strain ranges of 0.75% and 1%, and 180 s holding per a cycle at the peak compressive stress was applied. Based on the existing data of pure creep, pure fatigue and CF, constitutive relations of pull-plastic and push-creep were formulated by the strain-range partitioning method and used to estimate CF lifetime of F82H. The estimated lifetime agrees with CF experimental results within the factor of two. The developed correlation formula and CF experiment results show that fatigue damages decrease with decreasing total strain range. The achievements enable us to arrange appropriate CF test conditions to develop a comprehensive CF damage envelope for F82H. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 31st Symposium on Fusion Technology | |||||
| 発表年月日 | ||||||
| 日付 | 2020-09-22 | |||||
| 日付タイプ | Issued | |||||
