Grain Refinement of an As-Cast CoCrNi Multi-principal Element Alloy by Inducing Solute Segregation: Solute Design and Effects

Liu, Xinwang; Xie, Lu; Wang, Youshan; Yao, Jun; Zhu, Chao; Fan, S.; Xie, Ning; Cao, Huatang

doi:10.1007/s11661-023-07126-5

Cited by 5 publications

(2 citation statements)

References 62 publications

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“…The modulation of alloying element content can effectively control these aforementioned characteristics, as alterations in alloy composition trigger a cascade of intrinsic property transformations within the alloy materials. For instance, Al, Ta and Nb elements induce phase transformation [8][9][10], Si and B elements refine grain structure [11,12], C, Mo and Ti elements promote nanotwin generation [13][14][15], Cu, Cr, and S elements alleviate or accelerate component segregation [16][17][18], and Zn and W elements enhance solid solution strengthening [19,20]. It can be seen that the internal structural characteristics of alloy materials can be directly or indirectly influenced by adjusting the content of alloying elements, thereby impacting the physical properties of alloy materials.…”

Section: Introductionmentioning

confidence: 99%

Competitive Mechanism of Alloying Elements on the Physical Properties of Al10Ti15Nix1Crx2Cox3 Alloys through Single-Element and Multi-Element Analysis Methods

Liu,

Wang,

Zhao

et al. 2024

Coatings

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Altering the content of an alloying element in alloy materials will inevitably affect the content of other elements, while the effect is frequently disregarded, leading to subsequent negligence of the common influence on the physical properties of alloys. Therefore, the correlation between alloying elements and physical properties has not been adequately addressed in the existing studies. In response to this problem, the present study focuses on the Al10Ti15Nix1Crx2Cox3 alloys and investigates the competitive interplay among Ni, Cr, and Co elements in the formation of physical properties through a single-element (SE) analysis and a multi-element (ME) analysis based on the first principles calculations and the partial least squares (PLS) regression. The values of C11 and C44 generally increase with the incorporation of Ni or Cr content in light of SE analysis, which is contrary to the inclination of ME analysis in predicting the impact of Ni and Cr elements, and the Ni element demonstrates a pronounced negative competitive ability. The overall competitive relationship among the three alloying elements suggests that increasing the content of Ni and Cr does not contribute to enhancing the elastic constants of alloys, and the phenomenon is also observed in the analysis of elastic moduli. The reason is that the SE analysis fails to account for the aforementioned common influence of multiple alloying elements on the physical properties of alloys. Therefore, the integration of SE analysis and ME analysis is more advantageous in elucidating the hidden competitive mechanism among multiple alloying elements, and offering a more robust theoretical framework for the design of alloy materials.

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Section: Introductionmentioning

confidence: 99%

Competitive Mechanism of Alloying Elements on the Physical Properties of Al10Ti15Nix1Crx2Cox3 Alloys through Single-Element and Multi-Element Analysis Methods

Liu,

Wang,

Zhao

et al. 2024

Coatings

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“…They studied the influence of the selected elements on the mechanical strength of the grain boundary under the framework of Rice–Thompson–Wang theory, and the most harmful elements are determined from the perspective of interface cohesion weakening. The solute element segregation induced grain boundary strengthening has been studied on different scales of experiment and simulation in the past, and the design of solute element grain boundary segregation has become a mature alloy strengthening strategy − .…”

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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Microstructure and properties of the welding heat-affected zone in CoCrNi medium-entropy alloy

Liu,

Zhou,

Dong

et al. 2024

Journal of Materials Research and Technology

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Grain Refinement of an As-Cast CoCrNi Multi-principal Element Alloy by Inducing Solute Segregation: Solute Design and Effects

Cited by 5 publications

References 62 publications

Competitive Mechanism of Alloying Elements on the Physical Properties of Al10Ti15Nix1Crx2Cox3 Alloys through Single-Element and Multi-Element Analysis Methods

Competitive Mechanism of Alloying Elements on the Physical Properties of Al10Ti15Nix1Crx2Cox3 Alloys through Single-Element and Multi-Element Analysis Methods

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

Microstructure and properties of the welding heat-affected zone in CoCrNi medium-entropy alloy

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