TY - JOUR
T1 - Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation
AU - Yoshida, N.
AU - Xu, Q.
AU - Watanabe, H.
AU - Miyamoto, Y.
AU - Muroga, T.
PY - 1994/9
Y1 - 1994/9
N2 - To understand mechanistically the influence of cyclic temperature change on microstructural evolution in Fe-Cr-Ni austenitic alloys, temperature-cycle neutron irradiations of 473 K/673 K and 573 K/723 K were carried out at JMTR (0.9-1.4 × 1024 n/m2 (> 1.0 MeV)). Suppression of interstitial loop formation was remarkable. Only a few large voids were formed in Fe-Cr-Ni and Fe-Cr-Ni-P alloys, but unexpectedly large void swelling (1.5-1.6%, 9-11%/dpa) was observed in Fe-Cr-Ni-Ti alloy. Rate theory of defect clustering for temperature-variant irradiation indicates that vacancy-rich condition appears temporarily at the beginning of the high-temperature period due to the reclustering of the vacancies formed in the low-temperature period through the reactions with radiation-induced vacancies and interstitials.
AB - To understand mechanistically the influence of cyclic temperature change on microstructural evolution in Fe-Cr-Ni austenitic alloys, temperature-cycle neutron irradiations of 473 K/673 K and 573 K/723 K were carried out at JMTR (0.9-1.4 × 1024 n/m2 (> 1.0 MeV)). Suppression of interstitial loop formation was remarkable. Only a few large voids were formed in Fe-Cr-Ni and Fe-Cr-Ni-P alloys, but unexpectedly large void swelling (1.5-1.6%, 9-11%/dpa) was observed in Fe-Cr-Ni-Ti alloy. Rate theory of defect clustering for temperature-variant irradiation indicates that vacancy-rich condition appears temporarily at the beginning of the high-temperature period due to the reclustering of the vacancies formed in the low-temperature period through the reactions with radiation-induced vacancies and interstitials.
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U2 - 10.1016/0022-3115(94)90106-6
DO - 10.1016/0022-3115(94)90106-6
M3 - Article
AN - SCOPUS:0028496459
SN - 0022-3115
VL - 212-215
SP - 471
EP - 475
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - PART 1
ER -