Effect of pulsed-laser and/or electron irradiation on vacancy diffusion in SUS316L austenitic stainless steel
Electron irradiation and simultaneous pulsed-laser and electron dual-beam irradiation were performed using laser high voltage electronic microscopy (HVEM) at 500℃, and the void-denuded zone (VDZ) and radiation-induced segregation (RIS) near the random grain boundary were observed and analyzed after...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Science Press
2017-06-01
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| Series: | 工程科学学报 |
| Subjects: | |
| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.06.013 |
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| Summary: | Electron irradiation and simultaneous pulsed-laser and electron dual-beam irradiation were performed using laser high voltage electronic microscopy (HVEM) at 500℃, and the void-denuded zone (VDZ) and radiation-induced segregation (RIS) near the random grain boundary were observed and analyzed after irradiation. Compared to electron irradiation, the effect of simultaneous pulsed-laser and electron dual-beam irradiation on vacancy diffusion was investigated. The results show that the width of VDZ after simultaneous pulsed-laser and electron dual-beam irradiation is 48 ±16 nm which is smaller than the VDZ width of 71 ±27 nm after electron irradiation. Both the magnitude and width of Cr and Ni segregation under simultaneous pulsed-laser and electron dual-beam irradiation are lower than those under electron irradiation. The ratio of vacancy flux of simultaneous pulsed-laser and electron dual-beam irradiation to that of electron irradiation is 45.7%. Compared to electron irradiation, the vacancy flux flowing into point defect sinks is lower owing to enhanced recombination between vacancies and interstitial spaces under simultaneous pulsed-laser and electron dualbeam irradiation. This has the effect of suppressing RIS and void swelling. Therefore, simultaneous pulsed-laser and electron dualbeam irradiation is expected to provide new insights into the suppression of void swelling. |
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| ISSN: | 2095-9389 |