Evolution of ion damage at 773K in Ni- containing concentrated solid-solution alloys

Shi, Shi; He, Mo‐Rigen; Jin, Ke; Bei, Hongbin; Robertson, I. M.

doi:10.1016/j.jnucmat.2018.01.015

Cited by 33 publications

(7 citation statements)

References 33 publications

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“…See, for example, the results of Rutherford backscattering (RBS) measurements in Figure 3 [ 80 ]. The accumulation in ternary and higher-order alloys seems to be even more sluggish than the binaries [ 3 , 76 , 81 ]. This trend has been rationalised by suggesting that although fewer defects are created by each cascade in the concentrated alloys (owing to the cascade kinetic effects outlined above), reduced defect mobilities provides fewer opportunities for inter-cascade annealing [ 56 , 58 , 69 ], eventually leading to a higher level of damage at saturation.…”

Section: The Potential Suitability Of Heas—irradiation Resistant?mentioning

confidence: 99%

“…Studies have sometimes described trends that apparently contradict those reported by others. For instance, works examining defect generation using in-situ irradiation of thin films have reported a lower density of defects in more concentrated alloys, and that these were larger in size than in pure Ni [ 81 , 83 , 84 ].…”

Section: The Potential Suitability Of Heas—irradiation Resistant?mentioning

confidence: 99%

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High-Entropy Alloys for Advanced Nuclear Applications

Pickering

Carruthers

Barron

et al. 2021

Entropy

181

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The expanded compositional freedom afforded by high-entropy alloys (HEAs) represents a unique opportunity for the design of alloys for advanced nuclear applications, in particular for applications where current engineering alloys fall short. This review assesses the work done to date in the field of HEAs for nuclear applications, provides critical insight into the conclusions drawn, and highlights possibilities and challenges for future study. It is found that our understanding of the irradiation responses of HEAs remains in its infancy, and much work is needed in order for our knowledge of any single HEA system to match our understanding of conventional alloys such as austenitic steels. A number of studies have suggested that HEAs possess ‘special’ irradiation damage resistance, although some of the proposed mechanisms, such as those based on sluggish diffusion and lattice distortion, remain somewhat unconvincing (certainly in terms of being universally applicable to all HEAs). Nevertheless, there may be some mechanisms and effects that are uniquely different in HEAs when compared to more conventional alloys, such as the effect that their poor thermal conductivities have on the displacement cascade. Furthermore, the opportunity to tune the compositions of HEAs over a large range to optimise particular irradiation responses could be very powerful, even if the design process remains challenging.

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Section: The Potential Suitability Of Heas—irradiation Resistant?mentioning

confidence: 99%

Section: The Potential Suitability Of Heas—irradiation Resistant?mentioning

confidence: 99%

High-Entropy Alloys for Advanced Nuclear Applications

Pickering

Carruthers

Barron

et al. 2021

Entropy

181

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show abstract

“…One of the candidate materials for nextgeneration nuclear reactor components could be FCC type HEAs. Some recent papers have reported the initial examination of the fundamental irradiation behavior in HEAs, 21,22) thereby giving insight into the potential of those materials for nuclear applications.…”

Section: Introductionmentioning

confidence: 99%

“…It is reported that Co-based alloys exhibit the expected mechanical behavior and constitute a good solution for the use in nextgeneration nuclear energy systems. 1,21,22) However, Co would be highly activated by neutron irradiation. 23,24) In this study, therefore, face-centered cubic Co-free solid solution concentrated alloys were prepared in order to investigate their microstructure, mechanical properties as a basic study of the development of HEA applicable to the nuclear environment.…”

Section: Introductionmentioning

confidence: 99%

Cu-Containing High Entropy Alloys for Nuclear Fusion Application

2020

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Face-centered cubic Co-free Cu-containing solid solution concentrated alloys, Cu, CuNi, CuNiFe, Cu 0.3 NiFeCr, Al 0.4 CuFeCrNi 2 were prepared, and their microstructure, hardness, and tensile strengths were investigated in order to develop a new high entropy alloy with a high irradiation resistance, which is applicable for nuclear reactor components. All the as-cast alloys were identified as single-phase FCC alloys by Xray diffraction analysis. While, the SEM observation indicated a new Cr-rich phase with Cu-rich phase in the annealed Cu 0.3 NiFeCr alloy, which is probably due to low solubility of Cr and Cu in the alloy. After annealing at 1076°C for 120 hours, Cu 0.3 NiFeCr alloy became a single-phase FCC. Mechanical property examinations indicated the highest Vickers hardness, the highest Tensile strength and the smallest elongation in the Al 0.4 CuFeCrNi 2 . The results indicate that the Al 0.4 CuFeCrNi 2 alloy would have the potential to be a Co-free high-entropy alloy applicable to nuclear reactor components. In order to improve the elongation of Al 0.4 CuFeCrNi 2 , the detailed analysis of fracture surface and the optimization of annealing condition would be needed.

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“…18) Past works show that HEAs have some remarkable properties such as excellent mechanical properties, 2,911) good corrosion resistance 12,13) and high irradiation tolerance. 5,1416) Among all the reported HEAs, CrCoFeNi HEA system is the one which has been thoroughly studied by both experimental 9,1622) and theoretical 2226) methods.…”

Section: Introductionmentioning

confidence: 99%

Doping of Interstitials (H, He, C, N) in CrCoFeNi High Entropy Alloy: A DFT Study

et al. 2020

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The dissolution behavior of H, He, C and N in CrCoFeNi high entropy alloy (HEA) is studied by density functional theory calculation. Results show that the site preference of H, C and N in CrCoFeNi HEA is the octahedral site, while the site preference of He is the tetrahedral site. The dissolution energy of H in CrCoFeNi HEA is the lowest and that of He is the highest. The high dissolution energy of He is considered to be due to its closed-shell electronic structure. Moreover, results suggest that the H, He and N are more stable at the site with more Cr atoms, and C is more stable at the site with less Ni atoms. Furthermore, It is found that H, He, C and N have the effect in decreasing the magnetic moments of solutes in CrCoFeNi HEA. Electronic structure analysis shows that, for C and N, there is strong hybridization between them and solutes. It implies the chemical bonding between C, N and solutes is strong.

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Evolution of ion damage at 773K in Ni- containing concentrated solid-solution alloys

Cited by 33 publications

References 33 publications

High-Entropy Alloys for Advanced Nuclear Applications

High-Entropy Alloys for Advanced Nuclear Applications

Cu-Containing High Entropy Alloys for Nuclear Fusion Application

Doping of Interstitials (H, He, C, N) in CrCoFeNi High Entropy Alloy: A DFT Study

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