Effect of alloying elements on microstructure and properties of multiprincipal elements high-entropy alloys

Li, C.; Li, J.C.; Zhao, Mo; Jiang, Q.

doi:10.1016/j.jallcom.2008.07.124

Cited by 306 publications

(115 citation statements)

References 19 publications

(21 reference statements)

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“…The limited contribution of S  /k B for H-E alloys with disordered solid solutions could be explained by the Hume-Rothery rules [19] for forming solid solutions, which restrict the allowable maximum atomic size difference between solvent and solute elements in a solid solution. Specific explanations for stabilizing H-E alloys and destabilizing intermetallic compounds were given by Li et al [20]. that S config .…”

Section: Resultsmentioning

confidence: 99%

Entropies in Alloy Design for High-Entropy and Bulk Glassy Alloys

Takeuchi

Amiya

Wada

et al. 2013

Entropy

110

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High-entropy (H-E) alloys, bulk metallic glasses (BMGs) and high-entropy BMGs (HE-BMGs) were statistically analyzed with the help of a database of ternary amorphous alloys. Thermodynamic quantities corresponding to heat of mixing and atomic size differences were calculated as a function of composition of the multicomponent alloys. Actual calculations were performed for configurational entropy (S config. ) in defining the H-E alloys and mismatch entropy (S  ) normalized with Boltzmann constant (k B ), together with mixing enthalpy (H mix ) based on Miedema's empirical model and Delta parameter () as a corresponding parameter to S  /k B . The comparison between H mix - and H mix -σ B S k diagrams for the ternary amorphous alloys revealed S  /k B ~ ( /22) 2 . The zones S, S′ and B's where H-E alloys with disordered solid solutions, ordered alloys and BMGs are plotted in the H mix - diagram are correlated with the areas in the H mix -S  /k B diagram. The results provide mutual understandings among H-E alloys, BMGs and HE-BMGs.

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Section: Resultsmentioning

confidence: 99%

Entropies in Alloy Design for High-Entropy and Bulk Glassy Alloys

Takeuchi

Amiya

Wada

et al. 2013

Entropy

110

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“…The mesophase or complex multi-phase coexistence forms in HEAs due to the existences of some chemically-compatible elements. Li et al [73] studied the alloy of FeNiCrCuZr. They found that apart from the BCC phase, intermetallic compounds also precipitated in the alloy; and the formation of intermetallic compounds was due to the strong compoundformation tendency of Zr with other metals, consistent with measurements that the mixing enthalpies between Zr and other metals are too negative (Table 1).…”

Section: Mesophase and Other Complex Phases In Heasmentioning

confidence: 99%

Science and technology in high-entropy alloys

2018

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As human improve their ability to fabricate materials, alloys have evolved from simple to complex compositions, accordingly improving functions and performances, promoting the advancements of human civilization. In recent years, high-entropy alloys (HEAs) have attracted tremendous attention in various fields. With multiple principal components, they inherently possess unique microstructures and many impressive properties, such as high strength and hardness, excellent corrosion resistance, thermal stability, fatigue, fracture, and irradiation resistance, in terms of which they overwhelm the traditional alloys. All these properties have endowed HEAs with many promising potential applications. An in-depth understanding of the essence of HEAs is important to further developing numerous HEAs with better properties and performance in the future. In this paper, we review the recent development of HEAs, and summarize their preparation methods, composition design, phase formation and microstructures, various properties, and modeling and simulation calculations. In addition, the future trends and prospects of HEAs are put forward.

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“…Therefore, it will be preferred the formation of solid solutions of multiple elements instead of intermetallic compounds 1 . The effect of high entropy is the preference of the systems by the formation of BCC and/or FCC solid solutions phases 6,7 . It is known that the phase stability directly affect the microstructure and properties 8 .…”

Section: Introductionmentioning

confidence: 99%

Series of Nanocrystalline NiCoAlFe(Cr, Cu, Mo, Ti) High-Entropy Alloys produced by Mechanical Alloying

et al. 2016

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The mechanical alloying technique was employed to produce series of high entropy alloys, combining in equiatomic percentage Al, Co, Cr, Cu, Fe, Mo, Ni and Ti. Milling times were 0, 10, 20 and 30 h, and experiments were performed in a high energy ball mill (SPEX-8000M) under argon atmosphere. The structural and microstructural changes due to mechanical alloying process were studied by X-ray diffraction and electron microscopy. Although there is the presence of pure elements with HCP crystalline structure, the XRD patterns of as-milled powders revealed the presence of a mixture of nanocrystalline solid solution with FCC and BCC structure phases. The hardness of the powder samples was evaluated by Vickers microhardness testing. The average microhardness values indicate that the alloy with the greatest hardness is the NiCoAlFeMoCr.

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Effect of alloying elements on microstructure and properties of multiprincipal elements high-entropy alloys

Cited by 306 publications

References 19 publications

Entropies in Alloy Design for High-Entropy and Bulk Glassy Alloys

Entropies in Alloy Design for High-Entropy and Bulk Glassy Alloys

Science and technology in high-entropy alloys

Series of Nanocrystalline NiCoAlFe(Cr, Cu, Mo, Ti) High-Entropy Alloys produced by Mechanical Alloying

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