This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/T167/1/014007 in citations.
Mechanical and microstructural changes in tungsten due to irradiation damage
Mechanical and microstructural changes in tungsten due to irradiation damage
Stress-relieved pure tungsten received three damage levels (0.10, 0.25 and 0.50 dpa) by self-tungsten ion beam irradiation at room temperature. Positron annihilation spectroscopy showed the formation of mono-vacancies and vacancy clusters after ion beam exposure. In the first irradiation step (0–0.1...
Saved in:
Personal Name(s): | Uytdenhouwen, Inge (Corresponding author) |
---|---|
Schwarz-Selinger, T. / Coenen, J. W. / Wirtz, Marius | |
Contributing Institute: |
Plasmaphysik; IEK-4 Werkstoffstruktur und -eigenschaften; IEK-2 |
Published in: | Physica scripta, T167 (2016) S. 014007 - |
Imprint: |
Bristol
IoP Publ.
2016
|
DOI: |
10.1088/0031-8949/T167/1/014007 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Publikationsportal JuSER |
Stress-relieved pure tungsten received three damage levels (0.10, 0.25 and 0.50 dpa) by self-tungsten ion beam irradiation at room temperature. Positron annihilation spectroscopy showed the formation of mono-vacancies and vacancy clusters after ion beam exposure. In the first irradiation step (0–0.10 dpa) some splitting up of large vacancy clusters occurred which became more numerous. For increasing dose to 0.25 dpa, growth of the vacancy clusters was seen. At 0.50 dpa a change in the defect formation seems to occur leading to a saturation in the lifetime signal obtained from the positrons. Nano-indentation on the cross-sections showed a flat damage depth distribution profile. The nano-indentation hardness increased for increasing damage dose without any saturation up to 0.50 dpa. This means that other defects such as dislocation loops and large sized voids seem to contribute. |