Thermodynamics and kinetics of discontinuous precipitation in Cu–9Ni–xSn alloy

Liao, Yuehui; Xie, Mingwang; Chen, Huiming; Xie, Wei; Wang, Hang; Yang, Bin

doi:10.1016/j.jallcom.2020.154314

Cited by 22 publications

(2 citation statements)

References 29 publications

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“…Cu-Ni-Sn tends to undergo spinodal decomposition transformation at the early stage of aging (below 520 • C) [6,7]. At the beginning of aging treatment, the DO 22 and L 12 ordered phases are transformed from the Sn-rich zone, and the alloy has the highest strength at this stage [8][9][10]. As the aging treatment proceeds, discontinuous precipitation (DP) structure nucleates at the grain boundary and grows rapidly ingrain, which adversely affects the mechanical properties of the alloy [11,12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Mo Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy

Zhang

Shu³

et al. 2022

Materials

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In the present study, Mo was added to Cu–15Ni–8Sn alloy as the fourth element to solve the limitation of service performance of the alloy by composition design. The phase composition, microstructure transformation and mechanical properties of Cu–15Ni–8Sn–xMo (x = 0.3, 0.9, 1.5 wt.%) alloy were systematically studied by simulation calculation and experimental characterization. The results show that the addition of Mo can improve the as-cast structure of Cu–15Ni–8Sn alloy and reduce segregation and Cu–Mo phase precipitates on the surface with the increase in Mo contents. During solution treatment, Mo can partially dissolve into the matrix, which may be the key to improving the properties of the alloy. Furthermore, the discontinuous precipitation of Sn can be effectively inhibited by adding the appropriate amount of Mo to Cu–15Ni–8Sn alloy, and the hardness of alloy does not decrease greatly after a long-time aging treatment. When Mo content is 0.9 wt.%, the alloy reaches the peak hardness of 384 HV at 4 h of aging. These results provide new ideas for composition optimization of Cu–15Ni–8Sn alloy.

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Section: Introductionmentioning

confidence: 99%

Effect of Different Mo Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy

Zhang

Shu³

et al. 2022

Materials

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“…The copper-nickel-tin alloy is one of the important copper alloys that is widely used in modern industries such as aerospace, rail transit, heavy-duty machinery, marine engineering, etc. [1][2][3][4][5][6][7] In recent years, many researchers have been attracted to the study of how to improve the mechanical properties and conductivity of copper-nickel-tin alloys such as Cu-15Ni-8Sn [8][9][10] and Cu-9Ni-6Sn, with high contents of Ni and Sn elements [11,12]. It is well known that the mechanical properties depend on the microstructures; thus, the microstructure evolution and influencing factors should be researched systematically.…”

Section: Introductionmentioning

confidence: 99%

Revealing the Effect of Phase Composition and Transformation on the Mechanical Properties of a Cu–6Ni–6Sn–0.6Si Alloy

et al. 2021

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In the present study, a Cu–6Ni–6Sn–0.6Si alloy is fabricated through frequency induction melting, then subjected to solution treatment, rolling, and annealing. The phase composition, microstructure evolution, and transition mechanism of the Cu–6Ni–6Sn–0.6Si alloy are researched systematically through simulation calculation and experimental characterization. The ultimate as-annealed sample simultaneously performs with high strength and good ductility according to the uniaxial tensile test results at room temperature. There are amounts of precipitates generated, which are identified as belonging to the DO22 and L12 phases through the transmission electron microscope (TEM) analysis. The DO22 and L12 phase precipitates have a significant strengthening effect. Meanwhile, the generation of the common discontinuous precipitation of the γ phase, which is harmful to the mechanical properties of the copper–nickel–tin alloy, is inhibited mightily during the annealing process, possibly due to the existence of the Ni5Si2 primary phase. Therefore, the as-annealed sample of the Cu–6Ni–6Sn–0.6Si alloy possesses high tensile strength and elongation, which are 967 MPa and 12%, respectively.

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High density of strong yet deformable intermetallic nanorods leads to an excellent room temperature strength-ductility combination in a high entropy alloy

et al. 2021

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Thermodynamics and kinetics of discontinuous precipitation in Cu–9Ni–xSn alloy

Cited by 22 publications

References 29 publications

Effect of Different Mo Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy

Effect of Different Mo Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy

Revealing the Effect of Phase Composition and Transformation on the Mechanical Properties of a Cu–6Ni–6Sn–0.6Si Alloy

High density of strong yet deformable intermetallic nanorods leads to an excellent room temperature strength-ductility combination in a high entropy alloy

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