Precipitation of supersaturated solute in H ion irradiated Fe-Au and Fe-Au-W alloys studied by positron annihilation spectroscopy

Precipitation of supersaturated solute in H ion irradiated Fe-Au and Fe-Au-W alloys studied by positron annihilation spectroscopy

Zhang, Z. (Nanjing University of Aeronautics and Astronautics; Chinese Academy of Sciences)
Zhang, S. (Nanjing University of Aeronautics and Astronautics)
Yao, Z. (Nanjing University of Aeronautics and Astronautics)
Tao, X. (Nanjing Institute of Technology)
Cao, X. (Chinese Academy of Sciences)
Zhang, P. (Chinese Academy of Sciences)
Kuang, P. (Chinese Academy of Sciences)
Fu, Y. (TU Delft Novel Aerospace Materials)
van Dijk, N.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)
van der Zwaag, S. (TU Delft Novel Aerospace Materials)

2021

The effect of thermal aging of homogenized Fe-Au and Fe-Au-W alloys, irradiated at room temperature with hydrogen ions, was studied for an aging treatment at 300 °C for aging times up to 100 h. The aging behavior of the Fe-based alloys is compared to the results for pure Fe. The precipitation behavior of Au-rich and W-rich precipitates and its correlation to the H⁺ irradiation-induced defects is investigated by variable energy positron annihilation spectroscopy (VEPAS). The formation of open-volume defects after irradiation is monitored by an increase in the S parameter, while the recovery of the vacancy-like defects and the formation of precipitates are signalled by an increase in the W parameter. Au-rich precipitation continuously develops during long-term aging, as indicated by the increase in the W parameter. The change of the W parameter in the Fe-Au-W alloy is not only due to the effect of solute W on the Au precipitates, but also because of the interface of W-rich Laves phase with matrix.

Fe-based alloys
Hydrogen ion irradiation
Positron annihilation spectroscopy
Precipitation
Thermal aging

http://resolver.tudelft.nl/uuid:0b9f4780-10db-494a-a148-0b97737bcdcf

https://doi.org/10.1016/j.nimb.2021.06.022

2022-05-01

0168-583X

Nuclear Instruments & Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 505, 50-57

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.

Institutional Repository

journal article

© 2021 Z. Zhang, S. Zhang, Z. Yao, X. Tao, X. Cao, P. Zhang, P. Kuang, Y. Fu, N.H. van Dijk, S. van der Zwaag