Microstructure evolution and mechanical property of Cu-15Ni-8Sn-0.2Nb alloy during aging treatment

Wang, Nan; Shen, Yidi; An, Qi; Reddy, Kolan Madhav; Jin, Min; Karre, Rajamallu; Wang, Xiao Dong

doi:10.1016/j.jmst.2021.01.034

Cited by 41 publications

(6 citation statements)

References 40 publications

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“…Zhao J. C. et al [34] studied the phase transformation process of Cu-15Ni-8Sn alloy by TEM and obtained the TTT curve, as shown in Figure 4. Studies have shown that the phase transformation products of Cu-15Ni-8Sn alloy during the aging process mainly include spinodal structure, DO 22 ordered phase, L1 2 ordered phase, discontinuous precipitated phase (DO 3 ), and continuous precipitated γ phase at the grain boundary and intragranular [35], as shown in Figure 5. A large number of studies have shown that the time of spinodal decomposition is very short and may even have occurred in the solution quenching process [6,34,36].…”

Section: Phase Transition Sequencementioning

confidence: 99%

Research Progress on Cu–15Ni–8Sn Alloys: The Effect of Microalloying and Heat Treatment on Microstructure and Properties

Yang,

Song,

Zhou

et al. 2023

Materials

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Cu–15Ni–8Sn alloy is the best choice to replace beryllium bronze alloy. This alloy has unparalleled application value in aerospace, ocean engineering, electronic information, equipment manufacturing, and other fields. However, the application of Cu–15Ni–8Sn alloy is challenged and limited because of a series of problems in its preparation and processing, such as easy segregation, difficult deformation, and discontinuous precipitation. It is an effective way to improve the comprehensive properties of Cu–15Ni–8Sn alloy using alloying design and process optimization to control the as-cast, deformed, and heat-treated microstructures. At present, it is a hot spot for scholars to study. In this paper, the grade generation, system evolution, and preparation technology development of Cu–15Ni–8Sn alloy are comprehensively reviewed. The phase transformation sequence of the Cu–15Ni–8Sn alloy is discussed. The influence of the type, amount, and existing form of alloying elements on the strength of Cu–15Ni–8Sn alloy and its mechanism are systematically summarized. Furthermore, the latest research progress on the effects of solid solution, cold deformation, and aging on the phase structure transformation and mechanical properties of Cu–15Ni–8Sn alloy is summarized. Finally, the future development trend of the Cu–15Ni–8Sn alloy is projected. The research results of this paper can provide a reference for the control of the microstructure and properties of high-performance Cu–15Ni–8Sn alloys used in key fields, as well as the optimization of the preparation process and alloy composition.

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Section: Phase Transition Sequencementioning

confidence: 99%

Research Progress on Cu–15Ni–8Sn Alloys: The Effect of Microalloying and Heat Treatment on Microstructure and Properties

Yang,

Song,

Zhou

et al. 2023

Materials

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“…A sample with a dimension of 20 × 15 × 10 mm 3 was cut form the ingot; then, the sample was hot-rolled with 50% deformation, followed by a solution treatment at 850 • C for 6 h. Finally, the solution-treated sample was subjected to room temperature rolling with 30% deformation and followed by annealing at 350 • C for 2 h. The deformation amount was calculated by the formula (d0-d)/d0 × 100%, where d0 and d are the initial and ultimate thickness of the rolling sample, respectively. 8Sn and Cu-9Ni-6Sn [27,28]. The method of adding alloying elements such as V, Si, Cr, etc., has been used to solve the abovementioned difficulties for Cu-15Ni-8Sn and Cu-9Ni-6Sn [29][30][31][32].…”

Section: Sample Preparationmentioning

confidence: 99%

“…A lot of research shows that the segregation suppression of Sn during the solidification process and the inhibition of the discontinuous precipitation of the γ phase during the heat treatment process are two difficulties which can directly influence their comprehensive performance and application in copper-nickel-tin alloys with high Ni and Sn contents [22][23][24][25][26]. In particular, the generation of the discontinuous precipitation of the γ phase can seriously impact the strength and ductility of copper-nickel-tin alloys such as Cu-15Ni-8Sn and Cu-9Ni-6Sn [27,28]. The method of adding alloying elements such as V, Si, Cr, etc., has been Materials 2021, 14, 5201 2 of 14 used to solve the abovementioned difficulties for Cu-15Ni-8Sn and Cu-9Ni-6Sn [29][30][31][32].…”

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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“…Scholars previously focused on the effects of alloying elements on the macroscopic Sn distribution, microscopic dendrite segregation, grain refinement and properties of Cu-15Ni-8Sn alloys, providing a reference for this study. [26][27][28][29] However, due to the complexity of element characteristics and solidification process in Cu-15Ni-8Sn alloy, and considering the requirements of comprehensive properties of the alloy system in different application scenarios, there is no public report on the second phase characteristics and evolution of Cu-15Ni-8Sn alloy as cast by adding Al and Y elements. In addition, the interaction mechanism of elements and its influence on the properties of the alloy after composite addition are still unclear.…”

Section: Introductionmentioning

confidence: 99%

Interaction mechanism of elements and second phase characteristics in as-cast Cu–15Ni–8Sn–(1Al–0.1Y) alloy

Yang,

Zhou,

Zhang

et al. 2024

Materials Science and Technology

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In this article, the effects of Al and Y elements on the microstructure and mechanical properties of Cu–15Ni–8Sn alloy were studied. The interaction mechanism between elements is proved by first-principles calculation. The results show that the strength of Cu–15Ni–8Sn–1Al–0.1Y alloy reaches 760 MPa, and the hardness of matrix (α-Cu) and Sn-rich phase (γ) are 292.43 and 341.65 HV, respectively, which are 23.78%, 97.80% and 65.21% higher than those of Cu–15Ni–8Sn alloy, respectively. The formation of a large number of dispersed nano-scale Ni3Al second phase is the main reason for the great improvement of the strength of the alloy. In addition, the solid solution of Al and the formation of the Ni17Y2 phase improve the hardness of the Sn-rich phase.

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Microstructure evolution and mechanical property of Cu-15Ni-8Sn-0.2Nb alloy during aging treatment

Cited by 41 publications

References 40 publications

Research Progress on Cu–15Ni–8Sn Alloys: The Effect of Microalloying and Heat Treatment on Microstructure and Properties

Research Progress on Cu–15Ni–8Sn Alloys: The Effect of Microalloying and Heat Treatment on Microstructure and Properties

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

Interaction mechanism of elements and second phase characteristics in as-cast Cu–15Ni–8Sn–(1Al–0.1Y) alloy

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