Impact of composition modification induced by ion beam Coulomb-drag effects on the nanoindentation hardness of HT9

Gigax, Jonathan G. and Kim, Hyosim and Aydoğan, Eda and Price, L. M. and Wang, X. and Maloy, S. A. and Garner, F. A. and Shao, L. (2019) Impact of composition modification induced by ion beam Coulomb-drag effects on the nanoindentation hardness of HT9. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 444 . pp. 68-73. ISSN 0168-583X (Print) 1872-9584 (Online)

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Abstract

Accelerator-based ion irradiation is commonly used to simulate neutron damage, in lieu of neutron irradiation due to limited availability of fast flux facilities and little to no activation of the samples. Neutron atypical effects, however, must be recognized and their impact minimized in order to achieve the most accurate microstructural evolution under ion bombardment. Mechanical property changes, which arise from the synergy of numerous radiation-induced changes, are especially susceptible to these neutron atypical effects. Of these effects, a recently studied neutron atypical effect, arising from Coulomb-drag of vacuum contaminants and subsequent compositional alteration, was shown to substantially suppress swelling. Through the use of an ion beam filtering system, the resulting void swelling was shown to closely match neutron irradiation data. In this study, the impact of compositional modification via Coulomb-drag on the mechanical property changes is examined through the use of nanoindentation on a ferritic/martensitic alloy, HT9, irradiated with and without the use of the ion beam filtering system.
Item Type: Article
Uncontrolled Keywords: Ion beam processing; Ion implantation; Nanoindentation
Divisions: Integrated Manufacturing Technologies Research and Application Center
Depositing User: Eda Aydoğan
Date Deposited: 10 May 2019 11:28
Last Modified: 26 Apr 2022 10:03
URI: https://research.sabanciuniv.edu/id/eprint/37000

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