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Evaluation and prediction of creep-fatigue lifetime of F82H
https://repo.qst.go.jp/records/2003025
https://repo.qst.go.jp/records/2003025e4874043-5823-406b-aea6-9d488caa7c62
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2026-03-23 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Evaluation and prediction of creep-fatigue lifetime of F82H | |||||||||||
| 言語 | en | |||||||||||
| 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_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| 著者 |
Wenhai Guan
× Wenhai Guan
× Hirose Takanori
× Kawamura Yoshinori
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | F82H, a reduced-activation ferritic/martensitic steel, is a key structural candidate for fusion breeding blankets, where components experience simultaneous high‑temperature creep and cyclic loading. This study evaluates its creep–fatigue (CF) behavior at 550 °C under a total strain range of 1.00% and proposes a predictive framework for CF lifetime estimation. CF tests with compression holding showed progressive lifetime reduction with increasing holding time per cycle. This study focused on two specific types of inelastic strains: plastic strain (εpp), which occurs due to tension and compression loads, and creep strain (εpc), which develops when a material is held under peak stress over time. It revealed that εpp remained constant, while εpc increased with dwell time. Stress relaxation behavior was independent of holding time and described by a unified constitutive relation. Material constants for εpc were identified, enabling the application of the strain‑range partitioning (SRP) method, which accurately reproduced experimental lifetimes within a factor of two. By integrating SRP, stress‑relaxation modeling, and hysteresis‑loop geometry, a master curve was constructed to predict CF lifetime for arbitrary holding times. The approach offers an efficient tool for CF assessment of fusion structural materials. | |||||||||||
| 書誌情報 |
Nuclear Materials and Energy 発行日 2026-03 |
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| DOI | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | 10.1016/j.nme.2026.102102 | |||||||||||
