Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7963109 | Journal of Nuclear Materials | 2018 | 7 Pages |
Abstract
In this work, the microstructure of pure tungsten irradiated in a target of the Swiss spallation neutron source is studied. The tested tungsten specimens were irradiated to two doses of 1.4 and 3.5â¯ddpa with 37 and 140â¯appm He at 80 and 110â¯Â°C, respectively. The specimen of 1.4 dpa was consecutively annealed at temperatures of 500â¯Â°C, 600â¯Â°C, 800â¯Â°C and 900â¯Â°C, for 1â¯h, and the post-irradiation annealing effect on the microstructure was investigated. Microstructural features such as dislocations, defect clusters, dislocation loops and bubbles were observed by means of transmission electron microscopy (TEM). TEM images were obtained in different areas of the samples, to obtain quantitative information of the dislocations and defect clusters. There was a significant change in the microstructure of the tungsten after irradiation and post-irradiation annealing. The average dislocation density and defect cluster density were evaluated.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Barbara Horvath, Yong Dai, Yongjoong Lee,