Irradiation-induced swelling and hardening in HfNbTaTiZr refractory high-entropy alloy

Chang, Stanley; Tseng, Ko-Kai; Yang, Tzu‐Yi; Chao, Der-Sheng; Yeh, Jien‐Wei; Liang, Jenq–Horng

doi:10.1016/j.matlet.2020.127832

Cited by 59 publications

(6 citation statements)

References 12 publications

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“…A number of suggestions were made in early studies about the special resistance of HEAs to irradiation damage, these include (i) higher resistance to irradiation defect formation [ 47 , 48 , 49 , 50 ], (ii) lower void swelling in comparison to conventional alloys [ 51 , 52 , 53 ], (iii) higher microstructural stability (usually phase stability) than conventional alloys under irradiation [ 49 , 51 , 52 , 54 , 55 ], and (iv) limited irradiation hardening [ 51 ]. Such generalisations have been less common in more recent work, but there is still an underlying sentiment in many reports that HEAs have special irradiation resistance.…”

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

162

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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%

High-Entropy Alloys for Advanced Nuclear Applications

Pickering

Carruthers

Barron

et al. 2021

Entropy

162

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“…According to Senkov et al, the addition of 10 atomic % Al to the NbNiTaTiW alloy led to an increase in hardness due to the decrease in the dendrite size, with both alloys (NbNiTaTiW and NbNiTaTiWAl) showing effect in hardness after heat treatment, and as the soaking time was increased up to 72 h, the hardness (the Vickers's hardness values of both alloys are shown in Table 1) was increased due to the increasing the volume fraction of the L1 2 phase [27]. After radiation exposure, no phase change was observed in HfNbTaTiZr RHEA, and this study experimentally showed that HfNbTaTiZr RHEA has excellent resistance to radiation, so this material is suitable to use in radiation [28] [29]. Segregation is the main problem in as-cast alloys in the case of refractory high-entropy alloys.…”

Section: Microstructure and Phasesmentioning

confidence: 65%

A Review of the Latest Developments in the Field of Refractory High-Entropy Alloys

et al. 2021

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This review paper provides insight into current developments in refractory high-entropy alloys (RHEAs) based on previous and currently available literature. High-temperature strength, high-temperature oxidation resistance, and corrosion resistance properties make RHEAs unique and stand out from other materials. RHEAs mainly contain refractory elements like W, Ta, Mo, Zr, Hf, V, and Nb (each in the 5–35 at% range), and some low melting elements like Al and Cr at less than 5 at%, which were already developed and in use for the past two decades. These alloys show promise in replacing Ni-based superalloys. In this paper, various manufacturing processes like casting, powder metallurgy, metal forming, thin-film, and coating, as well as the effect of different alloying elements on the microstructure, phase formation, mechanical properties and strengthening mechanism, oxidation resistance, and corrosion resistance, of RHEAs are reviewed.

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“…Regarding the study of the irradiation effects, such as swelling and hardening, the most common method is the ion irradiation method. When irradiated with 300 keV Ni + (1.5 × 10 16 ions/cm 2 ), the HfNbTaTiZr RHEA displayed significantly less swelling and hardening effects than traditional nuclear materials [ 221 ]. Also, for the HfTaTiVZr RHEA, it was observed to have around 20% hardening compared to 50% hardening for 304 stainless steel alloys under heavy ion exposure (4.4 MeV, 1.08 × 10 17 Ni 2+ ions/cm 2 ) [ 206 ].…”

Section: High Entropy Alloys—materials For Future Nuclear Reactorsmentioning

confidence: 99%

Aspects of Applied Chemistry Related to Future Goals of Safety and Efficiency in Materials Development for Nuclear Energy

Golgovici

Tudose²,

Diniasi³

et al. 2023

Molecules

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The present paper is a narrative review focused on a few important aspects and moments of trends surrounding materials and methods in sustainable nuclear energy, as an expression of applied chemistry support for more efficiency and safety. In such context, the paper is focused firstly on increasing alloy performance by modifying compositions, and elaborating and testing novel coatings on Zr alloys and stainless steel. For future generation reactor systems, the paper proposes high entropy alloys presenting their composition selection and irradiation damage. Nowadays, when great uncertainties and complex social, environmental, and political factors influence energy type selection, any challenge in this field is based on the concept of increased security and materials performance leading to more investigations into applied science.

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Irradiation-induced swelling and hardening in HfNbTaTiZr refractory high-entropy alloy

Cited by 59 publications

References 12 publications

High-Entropy Alloys for Advanced Nuclear Applications

High-Entropy Alloys for Advanced Nuclear Applications

A Review of the Latest Developments in the Field of Refractory High-Entropy Alloys

Aspects of Applied Chemistry Related to Future Goals of Safety and Efficiency in Materials Development for Nuclear Energy

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