TY  - JOUR
AU  - Uytdenhouwen, Inge
AU  - Schwarz-Selinger, T.
AU  - Coenen, J. W.
AU  - Wirtz, Marius
TI  - Mechanical and microstructural changes in tungsten due to irradiation damage
JO  - Physica scripta
VL  - T167
SN  - 1402-4896
CY  - Bristol
PB  - IoP Publ.
M1  - FZJ-2017-05333
SP  - 014007 -
PY  - 2016
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000383504700008
DO  - DOI:10.1088/0031-8949/T167/1/014007
UR  - https://juser.fz-juelich.de/record/836212
ER  -