Effect of helium on grain boundary segregation of austenitic stainless steel after proton irradiation

被引：3
|
作者：
Dewi, K [1 ]
Hasegawa, A [1 ]
Otsuka, S [1 ]
Abe, K [1 ]
机构：
[1] Tohoku Univ, Dept Quantum Sci & Energy Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan
来源：
FUSION TECHNOLOGY | 2001年 / 39卷 / 02期
关键词：
D O I：
10.13182/FST01-A11963300
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
In ITER, austenitic stainless steels are under consideration as a blanket structural material for temperature below 200 degreesC. Transmuted helium will be also produced in austenitic stainless steels by high-energy neutron irradiation, and it will affect microstructural development including grain boundary segregation. In this paper, the effects of helium on grain boundary segregation in austenitic stainless steels are studied using ion-irradiation experiment. The result showed that the onset of radiation induced segregation (RIS) by proton irradiation occurs somewhere between 0.1 and 0.5 dpa. Helium pre-implantation significantly reduced RIS of the major alloying elements. Mechanisms are discussed. Comparison of this result with neutron irradiated induced segregation showed qualitative agreement in the data trends. However, a large amount of segregation was observed in the proton irradiated 304 austenitic stainless steels specimens.
引用
收藏
页码：585 / 589
页数：5
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