Zhang, Shasha (author), Yao, Zhengjun (author), Zhang, Zhaokuan (author), Oleksandr, Moliar (author), Chen, Feida (author), Cao, Xingzhong (author), Zhang, Peng (author), van Dijk, N.H. (author), van der Zwaag, S. (author), Zhang, Shasha (author), Yao, Zhengjun (author), Zhang, Zhaokuan (author), Oleksandr, Moliar (author), Chen, Feida (author), Cao, Xingzhong (author), Zhang, Peng (author), van Dijk, N.H. (author), and van der Zwaag, S. (author)
High temperature radiation damage in binary bcc Fe alloys containing 1 atomic % Au or Cu due to Fe ion irradiation at 550 °C to a peak dose of 2.8 and 8.3 dpa is studied. The precipitation behavior of gold and copper and its correlation to the irradiation-induced defects is studied by transmission electron microscopy and variable energy positron annihilation spectroscopy (VEPAS). The increase of S parameters from VEPAS indicates the formation of open volume defects upon irradiation. Disc-shaped Au precipitates, grown from the irradiation induced dislocations, are observed in the Fe-Au alloy. In the Fe-Cu alloy, spherical Cu particles are formed but no direct connection between Cu precipitates and radiation damage is detected. For the Fe-Au alloy, the surface hardness dramatically increases for a dose of 2.8 dpa, with a slight decrease as the irradiation dose is enhanced to 8.3 dpa. In the Fe-Cu alloy, radiation hardening increases continuously., Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public., RST/Fundamental Aspects of Materials and Energy, Novel Aerospace Materials