Effect of microstructure on fracture toughness of un-irradiated and irradiated heat affected zone materials of RPV steels

Katsuyama, Jinya ; Takamizawa, Hisashi ; Ha, Yoosung ; Nishiyama, Yutaka ; Onizawa, Kunio

We will present microstructure analysis results obtained by SEM and APT and so on for heat affected zone (HAZ) materials. The effects of microstructures such as grain size, phase fraction and martensite-austenite constituent on fracture toughness of HAZ materials were investigated. Also, the effects of solute cluster in the matrix and segregation near the carbide on irradiation embrittlement susceptibility will be discussed.

Language	:	English
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Meeting title	:	21st Meeting of International Group on Radiation Damage Mechanisms (IGRDM-21)
Held date	:	2019/05
Location (city)	:	Gifu
Location (country)	:	Japan
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Keywords	:	熱影響部; 中性子照射脆化; ミクロ組織分析
Research Facility	:	JRR-3M(研究炉3) ;WASTEF(廃棄物安全試験施設)
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Article of JAEA R&D Review	:
Cooperating Institute	:	原子力規制庁

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Registration No. : BB20190249
JAEA Abstracts No. :
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