Effect of pulsed-laser and/or electron irradiation on vacancy diffusion in SUS316L austenitic stainless steel

YANG Su-bing; YANG Zhan-bing; WANG Hui

doi:10.13374/j.issn2095-9389.2017.06.013

Volume 39 Issue 6

Jun. 2017

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YANG Su-bing, YANG Zhan-bing, WANG Hui. Effect of pulsed-laser and/or electron irradiation on vacancy diffusion in SUS316L austenitic stainless steel[J]. Chinese Journal of Engineering, 2017, 39(6): 903-908. doi: 10.13374/j.issn2095-9389.2017.06.013

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YANG Su-bing, YANG Zhan-bing, WANG Hui. Effect of pulsed-laser and/or electron irradiation on vacancy diffusion in SUS316L austenitic stainless steel[J]. Chinese Journal of Engineering, 2017, 39(6): 903-908. doi: 10.13374/j.issn2095-9389.2017.06.013

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Effect of pulsed-laser and/or electron irradiation on vacancy diffusion in SUS316L austenitic stainless steel

doi: 10.13374/j.issn2095-9389.2017.06.013

YANG Su-bing^1,2,
YANG Zhan-bing^{1,2
,
,},
WANG Hui^1,2

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2016-09-23

Abstract

Abstract

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.
- austenitic stainless steel,
- simultaneous pulsed-laser and electron dual-beam irradiation,
- excess vacancies,
- void denuded zone,
- radiation-induced segregation,
- void swelling

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References(26)

References

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