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

Date

2019-04-01

Author

Gigax, Jonathan G.
Kim, Hyosim
Aydoğan Güngör, Eda
Price, L. M.
Wang, X.
Maloy, S. A.
Garner, F. A.
Shao, L.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

189
views

0
downloads

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.

Subject Keywords

Nuclear and High Energy Physics, Instrumentation

URI

https://hdl.handle.net/11511/69918

Journal

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

DOI

https://doi.org/10.1016/j.nimb.2018.12.051

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Use of Al(2)O(3) layer as a dielectric in MOS based radiation sensors fabricated on a Si substrate YILMAZ, ERCAN; Dogan, Ilker; Turan, Raşit (Elsevier BV, 2008-11-01) The use of Al(2)O(3) dielectric in MOS based radiation sensors has been investigated. Their response has been compared with conventional MOS capacitors with a SiO(2) dielectric. The study includes gamma radiation effects with dose up to 4 Gy. The effect of radiation has been determined from the valance band shift in CV curves. The amount of charge induced by the radiation has been calculated and compared with the response of MOS capacitors with SiO(2) with the same and different thicknesses. Fading properti...
Measurement of the intrinsic radiopurity of (CS)-C-137/U-235/U-238/Th-232 in CsI(Tl) crystal scintillators Zhu, YF; Lin, ST; Singh, V; Chang, WC; Deniz, M; Lai, WP; Li, HB; Li, J; Li, Y; Liao, HY; Lee, FS; Wong, HT; Wu, SC; Yue, Q; Zhou, ZY (Elsevier BV, 2006-02-15) The inorganic crystal scintillator CsI(TI) has been used for low energy neutrino and Dark Matter experiments, where the intrinsic radiopurity is an issue of major importance. Low-background data were taken with a Csl(TI) crystal array at the Kuo-Sheng Reactor Neutrino Laboratory. The pulse shape discrimination capabilities of the crystal, as well as the temporal and spatial correlations of the events, provide powerful means of measuring the intrinsic radiopurity of Cs-137 as well as the U-215, U-238 and Th-...
Modulation of structure, morphology and wettability of polytetrafluoroethylene surface by low energy ion beam irradiation ATTA, ali; FAWZY, yasser; Bek, Alpan; Abdel-Hamid, Hassan M.; El-Oker, Mohamed M. (Elsevier BV, 2013-04-01) Polytetrafluoroethylene (PTFE) films were irradiated under vacuum with 3 keV Argon ions (Ar+) and fluences ranging from 0.5 x 10(18) to 2 x 10(18) ions/cm(2). Ion induced PTFE surface modifications of structural, morphological and wettability nature were studied by means of Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy, atomic force microscopy and force spectroscopy, and contact angle measurements. FTIR analysis indicated defluorination of PTFE due to the rupture of C-C and C-...
Nanohardness measurements of heavy ion irradiated coarse- and nanocrystalline-grained tungsten at room and high temperature El-Atwani, O.; Weaver, J. S.; Esquivel, E.; Efe, Mert; Chancey, M. R.; Wang, Y. Q.; Maloy, S. A.; Mara, N. (Elsevier BV, 2018-10-01) Heavy ion irradiation was performed on coarse and nanocrystalline-grained tungsten (CGW and NGW, respectively) at room temperature (RT) and 1050 K from 0.25 to 4 dpa to simulate radiation damage for fusion energy applications. TEM and nanohardness measurements of irradiated samples were made to quantify the radiation tolerance of these two candidate materials. In this case, TEM is used to quantify the defect morphology at low dpa values and determine the barrier strength coefficients of the different defect...
Effects of supersymmetric CP phases on chargino-pair production via the Drell-Yan process at the CERN LHC Cankocak, K; Aydemir, A; Sever, Ramazan (American Physical Society (APS), 2004-04-01) We compute the rates for pp annihilation into chargino pairs via the Drell-Yan process taking into account the effects of supersymmetric soft phases, at a proton-proton collider. In particular, the phase of the mu parameter gains direct accessibility via the production of dissimilar charginos. The phases of the trilinear soft masses do not have a significant effect on the cross sections.

Citation Formats

J. G. Gigax et al., “Impact of composition modification induced by ion beam Coulomb-drag effects on the nanoindentation hardness of HT9,” NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, pp. 68–73, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/69918.