Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation

N. Yoshida; Q. Xu; H. Watanabe; Y. Miyamoto; T. Muroga

doi:10.1016/0022-3115(94)90106-6

Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation

N. Yoshida, Q. Xu, H. Watanabe, Y. Miyamoto, T. Muroga

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	471-475
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	212-215
Issue number	PART 1
DOIs	https://doi.org/10.1016/0022-3115(94)90106-6
Publication status	Published - Sept 1994

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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10.1016/0022-3115(94)90106-6

Cite this

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title = "Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation",

abstract = "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.",

author = "N. Yoshida and Q. Xu and H. Watanabe and Y. Miyamoto and T. Muroga",

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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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Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation

Abstract

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