Specimen size effects on fracture toughness of F82H steel for fusion blanket structural material

Byung Jun Kim, Ryuta Kasada, Akihiko Kimura, Hiroyasu Tanigawa

研究成果: Chapter

3 被引用数 (Scopus)


Fusion energy has been considered to contribute to reducing emission of carbon dioxide effectively. Understanding and evaluating the fracture toughness behavior of neutron-irradiated reduced-activation ferritic (RAF) steels are essential in the design and operation of fusion reactor. In order to produce an enough database of irradiation effects on materials, the reduction of the specimen volume is required to acquire an enough number of data points. In the ITER Broader Approach (BA) project, applicability of small specimen test techniques (SSTT) has been examined to evaluate irradiation-induced degradation of fracture toughness of F82H steel. The master curve method, which was provided by the American Society for Testing and Materials (ASTM), is specified as a standard test method for determination of reference temperature for ferritic steels in the transition range. Fracture toughness tests were carried out for F82H steel in order to evaluate the effects of specimen size on the shift of transition curve using the various sizes of specimens (1 CT, 1/2 CT and 1/4 CT). The master curve approach was made for evaluation of fracture toughness of F82H with subsized specimens with constraint loss by referring to the ASTM E1921. Small specimen tests can be applicable to evaluate the fracture toughness of F82H steel with no substantial effect of specimen size.

ホスト出版物のタイトルZero-Carbon Energy Kyoto 2010
ホスト出版物のサブタイトルProceedings of the Second International Symposium of Global COE Program "Energy Science in the Age of Global Warming-Toward CO2 Zero-emission Energy System"
出版社Springer Verlag
出版ステータスPublished - 2011


名前Green Energy and Technology

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 管理、モニタリング、政策と法律
  • 産業および生産工学


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