Microstructure Evolution in Cu-Ni-Co-Si-Cr Alloy During Hot Compression by Ce Addition

Ban, Yijie; Zhang, Yi; Tian, Baohong; Jia, Yanlin; Song, Kexing; Li, Xu; Zhou, Meng; Liu, Yong; Volinsky, Alex A.

doi:10.3390/ma13143186

Cited by 9 publications

(11 citation statements)

References 41 publications

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“…This is because as the plastic deformation and dislocation density increase, and the dislocation intercross increases, which produces a dislocation pile-up group, dislocation jog, and dislocation tangle. This will increase the dislocation motion resistance, thereby resulting in an increase in deformation resistance and significant work hardening [ 24 , 25 , 26 ]. When strain reaches the critical value, dynamic recrystallization begins to occur, of which the softening effect increases gradually as the strain increases.…”

Section: Experimental Results Analysis Of X12 Ferritic Heat-resistant Steelmentioning

confidence: 99%

Identification of the Constitutive Model Parameters by Inverse Optimization Method and Characterization of Hot Deformation Behavior for Ultra-Supercritical Rotor Steel

Chen

et al. 2021

Materials

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X12 (X12CrMoWVNbN10-1-1) ferritic heat resistant steel is an important material for the production of new-generation ultra-supercritical generator rotors. Hot compression tests of X12 ferritic heat-resistant steel were performed via a Gleeble-1500D testing machine under temperatures of 1050–1250 °C and strain rates of 0.05–5 s−1. In order to provide material model data for finite element simulations and accurately predict the hot deformation behavior, a reverse optimization method was proposed to construct elevated temperature constitutive models of X12 ferritic heat-resistant steel in this paper, according to the Hansel–Spittel constitutive model. To verify the accuracy of the model, the predicted and experimental values of the constitutive model were compared. The results indicated that the model had a high prediction accuracy. Meanwhile, the correlation coefficient between the experimental value and the predicted value of constitutive model was 0.97833. For further verification of the accuracy of the model, it was implemented in finite element FORGE@ software to simulate the compression tests of different samples under different conditions. Comparing actual displacement–load curves with displacement–load curves acquired through finite element simulations, the results indicated that displacement–load curves predicted by the model were very consistent with actual displacement–load curves, which verified the accuracy of the model. Moreover, to research the optimal processing parameters of the material, hot processing maps were drawn according to the dynamic material model. In terms of microstructure evolution, a characteristic area distribution map of the hot processing map was established. Therefore, the optimal hot forming parameters regions were in the range of 1150–1200 °C/0.05–0.62 s−1 for X12 ferritic heat-resistant steel.

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Section: Experimental Results Analysis Of X12 Ferritic Heat-resistant Steelmentioning

confidence: 99%

Identification of the Constitutive Model Parameters by Inverse Optimization Method and Characterization of Hot Deformation Behavior for Ultra-Supercritical Rotor Steel

Chen

et al. 2021

Materials

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“…With increased Ce content, the average grain size decreases, as shown in Figure 5 [ 15 ]. Ban et al studied the influence of elemental Ce on the microstructure and properties of Cu–Ni–Co–Si–Cr alloy [ 13 ]. As shown in Figure 6 , the average grain size of Cu–Ni–Co–Si–Cr–Ce alloy is 48 μm, which is smaller than the 80 μm of Cu–Ni–Co–Si–Cr alloy [ 13 ].…”

Section: Influence Mechanismmentioning

confidence: 99%

“…Ban et al studied the influence of elemental Ce on the microstructure and properties of Cu–Ni–Co–Si–Cr alloy [ 13 ]. As shown in Figure 6 , the average grain size of Cu–Ni–Co–Si–Cr–Ce alloy is 48 μm, which is smaller than the 80 μm of Cu–Ni–Co–Si–Cr alloy [ 13 ]. The average size of the precipitated phase in Cu–Ni–Co–Si–Cr alloy is 73 nm, and in Cu–Ni–Co–Si–Cr–Ce alloy it is 27 nm [ 13 ].…”

Section: Influence Mechanismmentioning

confidence: 99%

“…As shown in Figure 6 , the average grain size of Cu–Ni–Co–Si–Cr–Ce alloy is 48 μm, which is smaller than the 80 μm of Cu–Ni–Co–Si–Cr alloy [ 13 ]. The average size of the precipitated phase in Cu–Ni–Co–Si–Cr alloy is 73 nm, and in Cu–Ni–Co–Si–Cr–Ce alloy it is 27 nm [ 13 ]. The addition of Ce delayed the occurrence of dynamic recrystallization, resulting in significant improvement in the mechanical properties of the composites, as shown in Figure 7 [ 13 ].…”

Section: Influence Mechanismmentioning

confidence: 99%

“…For example, the coordination bond between Ce and the oxygen-containing group of GO reduces the surface energy of GO and improves the dispersion of GO [ 3 ]. The addition of the proper amount of rare earth elements or their compounds can improve toughness, plasticity, corrosion resistance and heat resistance [ 13 ]. Recent studies have shown that the addition of rare earth can reduce the probability of electron scattering in copper alloys and thus increase the electrical conductivity to a certain extent [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Jiang

2022

Materials

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The existence of a small amount of rare earth metal oxides (REMOs) can greatly affect the structure and function of copper matrix composites owing to improvement of surface and interface properties between REMOs and metal matrix, and there are still some challenges concerning interfaces and complex interfacial reactions. This review summarizes the interfacial characteristics and strengthening mechanisms of REMO-reinforced copper matrix composites, including fabrication methods for solving rare earth metal oxide-dispersion problems and characterization of the microstructure and properties of REMO-reinforced copper matrix composites. In particular, the strengthening effects of various rare earth metal oxide-reinforced copper matrix composites are systematically summarized. The interface characteristics of composites from a thermodynamics standpoint and the strengthening mechanism are emphatically investigated and discussed in order to help unveil design principles and to provide reference for future research of REMO-reinforced copper matrix composites.

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Ce Effects on Deformation‐Induced Microstructure Evolution in Cu–Ti–Ni–Mg Alloys

et al. 2023

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Cu–Ti–Ni–Mg and Cu–Ti–Ni–Mg–Ce alloys are prepared by vacuum induction melting. The hot deformation tests of the two alloys are carried out on the Gleeble‐1500 simulator under the deformation temperatures of 550–950 °C and strain rates of 0.001–10 s−1. The true stress–strain curves of the two alloys are obtained and the constitutive equations are established. The activation energy of the Cu–Ti–Ni–Mg alloy is 344.02 kJ mol−1, and the activation energy of the Cu–Ti–Ni–Mg–Ce alloy is 389.87 kJ mol−1. Based on the processing maps, the optimal processing parameters of the two alloys are obtained. The microstructure of the two alloys is analyzed by electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The addition of Ce reduces the dislocation density and texture strength. The CuNi2Ti precipitates are found in both alloys, and there are more precipitates in the Cu–Ti–Ni–Mg–Ce alloys. The addition of Ce increases the flow stress and activation energy, promotes precipitation, and improves the deformation resistance of the alloys.

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Microstructure Evolution in Cu-Ni-Co-Si-Cr Alloy During Hot Compression by Ce Addition

Cited by 9 publications

References 41 publications

Identification of the Constitutive Model Parameters by Inverse Optimization Method and Characterization of Hot Deformation Behavior for Ultra-Supercritical Rotor Steel

Identification of the Constitutive Model Parameters by Inverse Optimization Method and Characterization of Hot Deformation Behavior for Ultra-Supercritical Rotor Steel

Research Progress in Interfacial Characteristics and Strengthening Mechanisms of Rare Earth Metal Oxide-Reinforced Copper Matrix Composites

Ce Effects on Deformation‐Induced Microstructure Evolution in Cu–Ti–Ni–Mg Alloys

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