Segregation of solute elements and strengthening effects of CoCrNiCux medium-entropy alloys: A combined experimental and simulation study

Pan, Zhimin; Luo, Hong; Ya, Wei; Cheng, Hongxu; Wang, Xuefei; Zhao, Qiancheng; Li, Yong

doi:10.1016/j.jallcom.2023.169015

Cited by 4 publications

(2 citation statements)

References 95 publications

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“…[ 142 , 143 , 144 ] This composite material combines the excellent properties of various components, and the introduced metal elements can refine the grain structure by solution segregation and phase separation effect. [ 145 , 146 , 147 , 148 ] However, it is still a challenge for the doped metal elements to be uniformly distributed in the matrix and form ultra‐fine structures. Taking the W–Cu matrix composite as an example, the homogeneous and compact W–Cu alloy has excellent electrical, thermal and mechanical properties.…”

Section: Homogenous and Inhomogeneous Architecturementioning

confidence: 99%

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Dai

et al. 2023

Advanced Science

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The natural design and coupling of biological structures are the root of realizing the high strength, toughness, and unique functional properties of biomaterials. Advanced architecture design is applied to many materials, including metal materials, inorganic nonmetallic materials, polymer materials, and so on. To improve the performance of advanced materials, the designed architecture can be enhanced by bionics of biological structure, optimization of structural parameters, and coupling of multiple types of structures. Herein, the progress of structural materials is reviewed, the strengthening mechanisms of different types of structures are highlighted, and the impact of architecture design on the performance of advanced materials is discussed. Architecture design can improve the properties of materials at the micro level, such as mechanical, electrical, and thermal conductivity. The synergistic effect of structure makes traditional materials move toward advanced functional materials, thus enriching the macroproperties of materials. Finally, the challenges and opportunities of structural innovation of advanced materials in improving material properties are discussed.

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Section: Homogenous and Inhomogeneous Architecturementioning

confidence: 99%

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Dai

et al. 2023

Advanced Science

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“…Solute element segregation may not only enhance the stability of grain boundaries but also inhibit the coarsening and growth of grains. In the study of CoCrNiCu alloy, Pan et al 1 found that proper addition of Cu can effectively improve the dual effects of solid solution strengthening and grain refinement of Cu-rich precipitates at nanometer size through Monte Carlo simulation, and effectively improve the tensile strength and yield strength. Hu et al 2 studied the segregation of solute elements in the symmetric inclined grain boundary and its influence on the grain boundary of Al Σ001 (2219).…”

Section: Introductionmentioning

confidence: 99%

The Optimum Grain Size of Nanocrystalline CuNi Alloy with Grain Boundary Segregation Structure

Chen

2023

Crystal Growth & Design

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Grain boundary segregation engineering can control the material properties by designing and changing the nonuniform distribution of solute elements in the alloy. The introduction of solute segregation in gradient nanocrystalline alloys can induce a secondary improvement in the mechanical properties. In our contribution, grain boundary segregation structures are designed in different gradient grain nanocrystals to enhance the mechanical properties of the alloy, and the effect of the change of gradient ratio on the mechanical behavior is observed. The results show that changing the gradient ratio of the alloy will affect the mechanical properties and deformation mechanism. There is an optimal gradient ratio which makes the yield strength and average flow stress of the nanocrystalline CuNi alloy reach the highest value of 1.7 and 1.8 GPa, respectively. In the optimal gradient ratio alloy, the dislocation density and the number of deformation twins reach the maximum, which are coupled with the grain boundary strengthening induced by grain boundary segregation, resulting in the superimposed strengthening effect of dislocation strengthening, grain boundary strengthening, and twin strengthening.

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Laser-directed energy deposition of a high performance additively manufactured (CoCrNi)94(TiAl)6 medium-entropy alloy with a novel core-shell structured strengthening phase

Bi,

Li,

Yuan

et al. 2024

Additive Manufacturing

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Segregation of solute elements and strengthening effects of CoCrNiCux medium-entropy alloys: A combined experimental and simulation study

Cited by 4 publications

References 95 publications

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical‐Functional Responses

The Optimum Grain Size of Nanocrystalline CuNi Alloy with Grain Boundary Segregation Structure

Laser-directed energy deposition of a high performance additively manufactured (CoCrNi)94(TiAl)6 medium-entropy alloy with a novel core-shell structured strengthening phase

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