Print Email Facebook Twitter Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation Title Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation Author Zhang, Shasha (Nanjing University of Aeronautics and Astronautics) Yao, Zhengjun (Nanjing University of Aeronautics and Astronautics) Zhang, Zhaokuan (Nanjing University of Aeronautics and Astronautics) Oleksandr, Moliar (Nanjing University of Aeronautics and Astronautics) Chen, Feida (Nanjing University of Aeronautics and Astronautics) Cao, Xingzhong (Institute of High Energy Physics Chinese Academy of Science) Zhang, Peng (Institute of High Energy Physics Chinese Academy of Science) van Dijk, N.H. (TU Delft RST/Fundamental Aspects of Materials and Energy) van der Zwaag, S. (TU Delft Novel Aerospace Materials) Date 2020 Abstract 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. Subject Au/Cu precipitationbcc FeHardeningNanoindentationPositron annihilation spectroscopyRadiation damage To reference this document use: http://resolver.tudelft.nl/uuid:8d8f5189-46c4-4d5e-81ef-3b51ff5509a9 DOI https://doi.org/10.1016/j.nimb.2019.11.035 Embargo date 2020-06-01 ISSN 0168-583X Source Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 463, 69-75 Bibliographical note 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. Part of collection Institutional Repository Document type journal article Rights © 2020 Shasha Zhang, Zhengjun Yao, Zhaokuan Zhang, Moliar Oleksandr, Feida Chen, Xingzhong Cao, Peng Zhang, N.H. van Dijk, S. van der Zwaag Files PDF 1_s2.0_S0168583X19307906_main.pdf 6.39 MB Close viewer /islandora/object/uuid:8d8f5189-46c4-4d5e-81ef-3b51ff5509a9/datastream/OBJ/view