MOLECULAR DYNAMICS SIMULATION OF MATRIX RADIATION DAMAGE IN Fe-Cu ALLOY

doi:10.3724/SP.J.1037.2011.00207

Acta Metall Sin

2011, Vol. 47

Issue (7): 954-957 DOI: 10.3724/SP.J.1037.2011.00207

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MOLECULAR DYNAMICS SIMULATION OF MATRIX RADIATION DAMAGE IN Fe-Cu ALLOY

HE Xinfu, YANG Peng, YANG Wen

China Institute of Atomic Energy, Beijing 102413

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HE Xinfu YANG Peng YANG Wen. MOLECULAR DYNAMICS SIMULATION OF MATRIX RADIATION DAMAGE IN Fe-Cu ALLOY. Acta Metall Sin, 2011, 47(7): 954-957.

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Abstract The reactor pressure vessel (RPV) is the highest priority key component in nuclear power plants and is considered irreplaceable. The embrittlement of RPV steels is in general thought to be caused primarily by the formation of Cu-enriched clusters, the formation of matrix damage features, and the segregation of P atoms at grain boundaries. The displacement cascades in Fe-0.05Cu and Fe-0.3Cu alloys were studied by molecular dynamics in the current work. It was found that substitutional Cu does not significantly affect the amount, annihilation and recombination of defect produced by displacement cascade but affects the vacancy migration energy significantly. The self-interstitial atoms (SIAs) clusters and vacancies clusters are formed during the displacement cascades and affected by irradiation temperature.

Key words: Fe-Cu alloy radiation damage molecular dynamics defects cluster

Received: 06 April 2011

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Supported by National Basic Research Program of China (Nos.2011CB610503 and 2007CD209801) and National Natural Science Foundation of China (No.10975194)

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https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00207 OR https://www.ams.org.cn/EN/Y2011/V47/I7/954

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