期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 669, 期 -, 页码 117-122出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.01.242
关键词
High entropy alloy; Radiation damage; X-ray diffraction; Positron annihilation spectroscopy
Defect characterization of room temperature 1.5 MeV Ni ion implanted high entropy FeCrCoNi alloy for two fluences (1 x 10(15) ions/cm(2) and 5 x 10(16) ions/cm(2)) was carried out using the variable low energy positron beam. The FCC solid solution remains robust and stable under 100 dpa irradiation and high temperature annealing. The change in the defect sensitive S-parameter upon implantation reveals the presence of monovacancies for both the doses. The changes in the defect microstructure upon thermal annealing are found to be dose dependent. The high dose shows the formation of stable stacking fault tetrahedrons (SFT's) from the aggregates of monovacancies at higher annealing temperatures while the low dose shows the annealing of monovacancies with temperature. (C) 2016 Elsevier B.V. All rights reserved.
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