The effects of irradiation on CrMnFeCoNi high-entropy alloy and its derivatives

Zhang, Zhouran; Armstrong, David E.J.; Grant, Patrick S.

doi:10.1016/j.pmatsci.2021.100807

Cited by 78 publications

(25 citation statements)

References 137 publications

(216 reference statements)

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“…The suppression of T c in crystalline SC materials against dpa is generally considered to be a result of the disorder effect associated with SC gap pairing symmetry and the degradation of crystallinity due to atomic disorder 38 , 42 . In contrast, the extraordinarily stable SC phase of HEAs against irradiation-induced disorder could be related to the occurrence of amorphization-recrystallization and the high interstitial–vacancy recombination rate associated with the high atomic-level stress and/or high-level lattice distortion in HEAs resulting from their high configuration entropy 3 , 43 – 45 . In addition, the random occupation of lattice sites of the constituent atoms of HEAs seems related to the robust superconductivity of HEAs against irradiation damage, because the atomic positions in the lattice altered by the recombination may have little effect on the characteristic of HEAs 16 .…”

Section: Resultsmentioning

confidence: 99%

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

et al. 2022

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High-entropy alloy (HEA) superconductors—a new class of functional materials—can be utilized stably under extreme conditions, such as in space environments, owing to their high mechanical hardness and excellent irradiation tolerance. However, the feasibility of practical applications of HEA superconductors has not yet been demonstrated because the critical current density (Jc) for HEA superconductors has not yet been adequately characterized. Here, we report the fabrication of high-quality superconducting (SC) thin films of Ta–Nb–Hf–Zr–Ti HEAs via a pulsed laser deposition. The thin films exhibit a large Jc of >1 MA cm−2 at 4.2 K and are therefore favorable for SC devices as well as large-scale applications. In addition, they show extremely robust superconductivity to irradiation-induced disorder controlled by the dose of Kr-ion irradiation. The superconductivity of the HEA films is more than 1000 times more resistant to displacement damage than that of other promising superconductors with technological applications, such as MgB2, Nb3Sn, Fe-based superconductors, and high-Tc cuprate superconductors. These results demonstrate that HEA superconductors have considerable potential for use under extreme conditions, such as in aerospace applications, nuclear fusion reactors, and high-field SC magnets.

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Section: Resultsmentioning

confidence: 99%

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

et al. 2022

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“…HEAs provide near-infinite new alloy bases for designing structural materials with excellent performance. Depending on the composition and microstructure, HEAs display attractive mechanical properties, and possible combinations of some properties, including high strength/hardness, outstanding wear resistance, excellent fatigue resistance, exceptional high-temperature strength, good structural stability, good corrosion and oxidation resistance, and high radiation tolerance [8,10,12,14]. Particularly, single-phase face-centered cubic (fcc) HEAs and medium-entropy alloys (MEAs) based on the transition metal elements Cr, Mn, Fe, Co, or Ni generally display some of the best mechanical properties reported to date [9][10][11][12][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Deformation Mechanisms of FCC-Phase High-Entropy Alloys

Ming¹,

Zheng²,

Wang³

2023

High Entropy Materials - Microstructures and Properties

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Strength and ductility are the most fundamental mechanical properties of structural materials. Most metallurgical mechanisms for enhancing strength often sacrifice ductility, referred to as the strength–ductility trade-off. Over the past few decades, a new family of alloys—high-entropy alloys (HEAs) with multi-principal elements, has appeared great potential to overcome the strength–ductility trade-off. Among various HEAs systems, CrFeCoNi-based HEAs with a face-centered cubic (fcc) structure exhibit a great combination of strength, ductility, and toughness via tailoring microstructures. This chapter summarizes recent works on realizing strength–ductility combinations of fcc CrFeCoNi-based HEAs by incorporating multiple strengthening mechanisms, including solid solution strengthening, dislocation strengthening, grain boundary strengthening, and precipitation strengthening, through compositional and microstructural engineering. The abundant plastic deformation mechanisms of fcc HEAs, including slips associated with Shockley partial dislocation and full dislocations, nanotwinning, martensitic phase transformation, deformation-induced amorphization, and dynamically reversible shear transformation, are reviewed. The design strategies of advanced HEAs are also discussed in this chapter, which provides a helpful guideline to explore the enormous number of HEA compositions and their microstructures to realize exceptional strength–ductility combinations.

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“…Deformation-induced martensitic transformation (DIMT) [1][2][3] plays an essential part in determining the mechanical properties of various kinds of crystalline materials such as highentropy alloys [4], shape memory alloys [5], and especially the austenitic stainless steels (AustSSs) widely used in the nuclear industry [6]. In irradiation environments, DIMT can be influenced by irradiation-induced microstructures, thus affecting the reliability and functionality of these materials [3,7,8]. For instance, it is found that DIMT in neutron-irradiated AustSSs is dramatically accelerated [9].…”

Section: Introductionmentioning

confidence: 99%

Model for deformation-induced martensitic transformation in irradiated materials

et al. 2023

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Deformation-induced martensitic transformation (DIMT) is commonly reported to be easily activated in irradiated materials, but the existing transformation kinetics models of DIMT hardly capture the irradiation effect. In this work, we develop a transformation kinetics model considering the effect of irradiation hardening, shear band evolution and the role of irradiation-induced voids. A crystal plasticity framework incorporating the newly developed transformation kinetics model is established. We show that the framework is capable of capturing the accelerated evolution of martensite volume fraction in both cases with and without irradiation-induced voids. Moreover, the framework successfully simulates two post-irradiation phenomena observed in experiments, i.e. the localized distribution of martensite fraction and the evolution of the dominant transformation pathway. The present work is one of the first attempts at the theoretical modelling of DIMT in irradiated materials, and has the potential to benefit the application of irradiation in tailoring the martensitic transformation behaviour.

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The effects of irradiation on CrMnFeCoNi high-entropy alloy and its derivatives

Cited by 78 publications

References 137 publications

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

High critical current density and high-tolerance superconductivity in high-entropy alloy thin films

Microstructures and Deformation Mechanisms of FCC-Phase High-Entropy Alloys

Model for deformation-induced martensitic transformation in irradiated materials

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