Long-Term Creep Behavior of a CoCrFeNiMn High-Entropy Alloy

Rozman, Kyle A.; Detrois, Martin; Liu, T.; Gao, Michael C.; Jablonski, Paul D.; Hawk, Jeffrey A.

doi:10.1007/s11665-020-05103-2

Cited by 21 publications

(3 citation statements)

References 60 publications

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“…Stainless steels have been the dominant material type for probabilistic structural integrity assessments in the UK nuclear sector. With the advent of new materials such as high-entropy alloys (HEAs), 95 Ni-base superalloys, 96 and additively manufactured materials, 97,98 which show excellent mechanical strength and corrosion resistance in harsh environments, further research is required to focus on these types of materials.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

A review of probabilistic structural integrity assessment in the nuclear sector and possible future directions

Chavoshi

Booker

Bradford

et al. 2021

Fatigue Fract Eng Mat Struct

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There always exists uncertainty and variability in structural integrity assessments arising from lack of knowledge, modeling approximations, or differences between as-manufactured components and as-operated components. This may ultimately impact on reactor lives. Such uncertainties and variabilities can be understood and quantified using probabilistic techniques together with reliability-based acceptance criteria, facilitating the quantification and management of risk. This review article provides a systematic appraisal of the latest worldwide literature and also unpublished reports from EDF UK nuclear plants, giving an overview of the existing knowledge of probabilistic/reliability structural integrity methodologies and tools from a multifaceted stance, including failure modes, problem types, material types, employed codes, correlations, and probability distributions. Structural reliability analysis at different levels is discussed, and pertinent issues on convergence testing, required number of trails, sensitivity analysis, verification of individual analyses, extremely small probabilities, reactor-wide failure probabilities, and digital twin structural integrity monitoring are elaborated.

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Section: Challenges and Perspectivesmentioning

confidence: 99%

A review of probabilistic structural integrity assessment in the nuclear sector and possible future directions

Chavoshi

Booker

Bradford

et al. 2021

Fatigue Fract Eng Mat Struct

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“…This material is most suitable for contact media in the oil and gas industry. The functions of stress relaxation in a layered composite can also be performed by layers of high-entropy materials [25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Development and Research of New Hybrid Composites in Order to Increase Reliability and Durability of Structural Elements

Rusinov

Blednova

Rusinova

et al. 2023

Metals

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Hybrid composite materials can successfully solve the problems of reliability, durability, and extended functionality of products, components, and details, which operate under conditions of multifactorial influences (temperature, force, and deformation). The authors have developed a hybrid composite high-entropy AlCoCrCuFeNi material and ceramic cBNCoMo(B4CCoMo) layer. The formation of hybrid composites was carried out using new technology. This technology includes high-energy machining, high-velocity oxygen-fuel spraying in a protective environment, high-temperature thermomechanical treatment, and heat treatment. The use of the developed technology made it possible to increase the adhesive strength of the composite layers from 68 to 192 MPa. The authors performed an assessment of the structural parameters of the composite layers. The assessment showed that the composite layers had a nanocrystalline structure. The research included mechanical tests of the hybrid composites Hastelloy X (NiCrFeMo)—AlCoCrCuFeNi—cBNCoMo and Hastelloy X (NiCrFeMo)—AlCoCrCuFeNi—B4CCoMo for cyclic durability (fatigue mechanical tests) and friction wear. The use of surface-layered materials AlCoCrCuFeNi—cBNCoMo and AlCoCrCuFeNi—B4CCoMo in the composition of hybrid composites significantly increased cyclic durability. The use of surface-layered materials in the composition of hybrid composites made it possible to reduce wear intensity. The test results show that the developed composites are promising for use in various industries (including oil and gas), where high strength and wear resistance of materials are required.

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“…On the other hand, it is possible to obtain the HEAs with a structure in which intermetallic compounds with high hardness values (Laves phases, σ phase) will be combined with a simple solid solution characterized by high ductility [1]. Many high-entropy alloys possess unique properties, such as wear-resistance, resistance to corrosion and oxidation, radiation resistance, high hardness and strength [1][2][3][4][5][6]. It should also be noted the superior biocompatibility demonstrated by some HEAs [4].…”

Section: Introductionmentioning

confidence: 99%

The effect of cooling rate on structure and mechanical properties of Co-Cr-Cu-Fe-Ni-Sn high entropy alloys

Kushnerov

Башев

2021

JPhysElectron

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The paper examines the structure and mechanical properties of multicomponent high-entropy CoCrCuFeNiSnx alloys in as-cast and splat-quenched states. The compositions of investigated alloys is analyzed by using the criteria for predicting the phase composition of high-entropy alloys available in the literature, based both on calculations of the entropy and enthalpy of mixing and on an estimate of the difference between the atomic radii of the component. The alloy films is fabricated by the known technique of splat-quenching. A cooling rate estimated by a film thickness is ~ 106 K/s. The simultaneous formation of two solid solutions (FCC + ordered BCC) has been established in the alloy structure. An increase in the concentration of Sn favors the formation of the ordered (В2 type) solid solution in the structure of the alloys. High values of the microhardness and dislocation density have been obtained in the splat-quenched samples. It is also shown that an increase in the Sn content positively affects the microhardness.

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Long-Term Creep Behavior of a CoCrFeNiMn High-Entropy Alloy

Cited by 21 publications

References 60 publications

A review of probabilistic structural integrity assessment in the nuclear sector and possible future directions

A review of probabilistic structural integrity assessment in the nuclear sector and possible future directions

Development and Research of New Hybrid Composites in Order to Increase Reliability and Durability of Structural Elements

The effect of cooling rate on structure and mechanical properties of Co-Cr-Cu-Fe-Ni-Sn high entropy alloys

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