Surface effect on void swelling behavior of stainless steel.
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概要
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The nucleation and growth of voids have been observed successively in differentthickness specimens of Type 316 stainless steel electron-irradiated at 550°C in a high voltage electron microscope. In a bulk representative 1.5μm thick specimen, the void number density increases rapidly and saturates during the initial stage of irradiation and then decreases with following dose by void coalescence. The swelling increases proportionally with (dpa) 1.5 up to about 30 dpa. In a thin specimen, of 0.4μm thickness, on the other hand, the void number density increases continuously with dose up to about 25 dpa. The swelling of the thin specimen showed a tendency to saturation due to the disappearance of voids at the specimen surfaces. The difference in swelling behavior between the 1.5 and 0.4μm thick specimens can be ascribed to the different effects of the specimen surfaces, which serve as a dominant sink for both radiation-produced point defects and dislocations.
- 一般社団法人 日本原子力学会の論文
著者
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Katano Yoshio
Japan Atomic Energy Research Institute
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SHIRAISHI Kensuke
Japan Atomic Energy Research Institute
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Hishinuma Akimichi
Japan Atomic Energy Research Institute
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