TY - JOUR
T1 - Evaluation of grain boundary embrittlement of phosphorus added F82H steel by SSTT
AU - Kim, Byung Jun
AU - Kasada, Ryuta
AU - Kimura, Akihiko
AU - Tanigawa, Hiroyasu
N1 - Funding Information:
The present study includes the result of “Broader Approach” project. The authors would like to express their gratitude to Kyoto University Global COE program “Energy Science in the Age of Global Warming” for funding to submit in JNM.
PY - 2012/2
Y1 - 2012/2
N2 - Non-hardening embrittlement (NHE) can be happened by a large amount of He on grain boundaries over 500-700 appm of bulk He without hardening at fusion reactor condition. Especially, at high irradiation temperatures (>≈420 °C), NHE accompanied by intergranular fracture affects the severe accident and the safety of fusion blanket system. Small specimen tests to evaluate fracture toughness and Charpy impact properties were carried out for F82H steels with different levels of phosphorous addition in order to simulate the effects of NHE on the shift of transition curve. It was found that the ductile to brittle transition temperature (DBTT) and reference temperature (T 0) after phosphorous addition is shifted to higher temperatures and accompanied by intergranular fracture at transition temperatures region. The master curve approach for evaluation of fracture toughness change by the degradation of grain boundary strength was carried out by referring to the ASTM E1921.
AB - Non-hardening embrittlement (NHE) can be happened by a large amount of He on grain boundaries over 500-700 appm of bulk He without hardening at fusion reactor condition. Especially, at high irradiation temperatures (>≈420 °C), NHE accompanied by intergranular fracture affects the severe accident and the safety of fusion blanket system. Small specimen tests to evaluate fracture toughness and Charpy impact properties were carried out for F82H steels with different levels of phosphorous addition in order to simulate the effects of NHE on the shift of transition curve. It was found that the ductile to brittle transition temperature (DBTT) and reference temperature (T 0) after phosphorous addition is shifted to higher temperatures and accompanied by intergranular fracture at transition temperatures region. The master curve approach for evaluation of fracture toughness change by the degradation of grain boundary strength was carried out by referring to the ASTM E1921.
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U2 - 10.1016/j.jnucmat.2011.11.063
DO - 10.1016/j.jnucmat.2011.11.063
M3 - Article
AN - SCOPUS:84155183057
SN - 0022-3115
VL - 421
SP - 153
EP - 159
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -