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

卷:444

Article

Gigax, Jonathan G.¹  Kim, Hyosim²  Aydogan, E.^1,3  Price, L. M.²  Wang, X.²  Maloy, S. A.¹  Garner, F. A.²  Shao, L.² 

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Texas A&M Univ, Dept Nucl Engn, College Stn, TX 77843 USA

[3] Sabanci Univ, Integrated Mfg Ctr, TR-34906 Istanbul, Turkey

关键词: Ion beam processing;    Ion implantation;    Nanoindentation;   

DOI  :  10.1016/j.nimb.2018.12.051

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free