Irradiation evolution of Cu precipitates in Fe1.0Cu alloy studied by positron annihilation spectroscopy

Jin, Shuoxue; Lian, Xiangyu; Zhu, Te; Gong, Yihao; Zhang, Peng; Cao, Xingzhong; Yu, Ruan; Wang, Boyu

doi:10.1016/j.jnucmat.2017.11.011

Cited by 14 publications

(6 citation statements)

References 25 publications

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“…Region I and II correspond to a positron energy range of 0.5-8 keV and 8-25 keV, respectively. Based on the experimental and theoretical results from Jin and coworkers where self-ions with a similar energy were implanted [11], Cu precipitates and Cu n V m complexes (n > m) are expected to be the dominant microstructure features in the region I whereas open volume defects, in the forms of dislocations and dislocation loops and Cu n V m complexes (n < m) are the main defect types in the region II.…”

Section: Resultsmentioning

confidence: 99%

“…The correlation between the irradiation-induced defects and Cu precipitates has been studied both theoretically [7][8][9] and experimentally [10][11][12]. Microstructural studies have shown that the irradiation-induced or enhanced Cu-rich precipitates (CRPs) are responsible for the irradiation hardening in copper-bearing iron-based alloys as they impede the dislocation motion [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

Zhang

Yao

Zhang

et al. 2020

Nuclear Instruments and Methods in Physics Research Section B:

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High temperature radiation damage in binary bcc Fe alloys containing 1 atomic % Au or Cu due to Fe ion irradiation at 550°C to a peak dose of 2.8 and 8.3 dpa is studied. The precipitation behavior of gold and copper and its correlation to the irradiation-induced defects is studied by transmission electron microscopy and variable energy positron annihilation spectroscopy (VEPAS). The increase of S parameters from VEPAS indicates the formation of open volume defects upon irradiation. Disc-shaped Au precipitates, grown from the irradiation induced dislocations, are observed in the Fe-Au alloy. In the Fe-Cu alloy, spherical Cu particles are formed but no direct connection between Cu precipitates and radiation damage is detected. For the Fe-Au alloy, the surface hardness dramatically increases for a dose of 2.8 dpa, with a slight decrease as the irradiation dose is enhanced to 8.3 dpa. In the Fe-Cu alloy, radiation hardening increases continuously.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

Zhang

Yao

Zhang

et al. 2020

Nuclear Instruments and Methods in Physics Research Section B:

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“…HRTEM images of CoCrFeMnNi HEA at different depths after HIPIB irradiation: (a1 -a4 ) 0.3 J/cm 2 , 300 pulses and (b1 -b4 ) 2.0 J/cm 2 , 3 pulses; subscripts 1-4 correspond to the region of near surface, 300 nm depth, 1 μm depth and 2 μm depth, respectively; the electron beam is along [110] zone axis. a change of the elemental distribution around vacancy-type defects [58]. After 1.2 J/cm 2 and 2.0 J/cm 2 irradiation, the elements of CoCrFeMnNi HEA redistributed due to the rapid remelting and solidification, and the change of elements around the vacancies may lead to the generation of the defect of slope III type.…”

Section: The Effects Of Hipib Irradiation On Microstructure Surface Morphology and Mechanical Property Of Cocrfemnni Heamentioning

confidence: 99%

Study on thermal shock irradiation resistance of CoCrFeMnNi high entropy alloy by high intensity pulsed ion beam

Zhang

et al. 2022

Journal of Nuclear Materials

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In recent years, high entropy alloys (HEAs) have attracted significant attention due to their excellent physical, chemical, mechanical properties, and good irradiation resistance, thus are considered as potential candidates for fission and fusion structural applications. CoCrFeMnNi HEA was irradiated by high intensity pulsed ion beam (HIPIB) to investigate the effects of thermal shock irradiation on its microstructure, surface morphology and mechanical properties. It was found that CoCrFeMnNi HEA maintained the face-centered cubic single-phase structure after HIPIB irradiation. The ion beam effect of irradiation produced numerous defects such as vacancies and stacking faults within the range of carbon ions. While the thermal effect reduced vacancy concentration beyond the ion range by promoting the recombination of vacancies with interstitials, and decreased the nano-hardness of CoCrFeMnNi HEA. The thermal effect and shock wave effect promoted the migration of vacancies and formed defects such as stacking faults etc. far beyond the ion range in CoCrFeMnNi HEA. Because of the very compositional complexity, the high-level chemical disorder and local lattice distortion of CoCrFeMnNi HEA, the lattice parameter was almost unchanged after HIPIB irradiation. Even if the temperature reached the melting point of CoCrFeMnNi HEA, there was no crack on the surface after surface remelting and rapid cooling. CoCrFeMnNi HEA showed good thermal stability and thermal shock irradiation resistance..

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“…When the samples are exposed to high temperature for a long time, the Au-V complexes aggregate around the irradiated dislocations, which act as nucleation sites to form the Au-rich precipitates [23,44]. Therefore, Au precipitates and dislocations loops dominate the microstructure along the L 5 line [45]. For the Fe-Au-W alloy, simultaneously the mixtureof dislocations between the Au precipitates [23,45] and the Fe matrix act as nucleation sites of the W-rich Laves precipitates, which influence the precipitation behavior of Au-rich precipitates.…”

Section: Doppler Broadening Spectroscopymentioning

confidence: 99%

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

Zhang

Yao

et al. 2021

Nuclear Instruments and Methods in Physics Research Section B:

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Irradiation evolution of Cu precipitates in Fe1.0Cu alloy studied by positron annihilation spectroscopy

Cited by 14 publications

References 25 publications

Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

Study on thermal shock irradiation resistance of CoCrFeMnNi high entropy alloy by high intensity pulsed ion beam

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

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