Inhibition of discontinuous precipitation and enhanced properties of Cu–15Ni–8Sn alloy with Fe addition

Guo, Chengjun; Jia, Wenbao; Chen, Jinshui; Xiao, Xiangpeng; Huang, Hao; Liu, Jingping

doi:10.1016/j.msea.2020.139917

Cited by 46 publications

(10 citation statements)

References 27 publications

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“…To clarify the distribution of elements in the as-cast alloy, SEM and EDS energy spectrum analyses were carried out on the Cu–15Ni–8Sn–(1Al–0.1Y) alloy (Figure 3). According to previous studies 10,30,31 and the XRD results in Figure 4, the as-cast microstructure of the alloy features a Sn-rich γ (CuNi 2 Sn) phase (point A), layered (α + γ) structure (point B) and α-Cu matrix (point C). 13,32 With the addition of Al and Y, Sn content increases in Sn-rich phase (point A) and decreases in layered structure (point B).…”

Section: Resultssupporting

confidence: 67%

“…Furthermore, by comparing Figure 2(c) and (d) with Figure 2(g) and (h), it is found that the size and morphology of interdendritic bony tissue have changed.The proportion of bony tissue has increased, and black tissue appears nearby, while the transition layer tissue is not obvious.To clarify the distribution of elements in the as-cast alloy, SEM and EDS energy spectrum analyses were carried out on the Cu-15Ni-8Sn-(1Al-0.1Y) alloy (Figure3). According to previous studies10,30,31 and the XRD results in Figure4, the as-cast microstructure of the alloy features a Sn-rich γ (CuNi 2 Sn) phase (point A), layered (α + γ) structure (point B) and α-Cu matrix (point C) 13,32. With the addition of Al and Y, Sn content increases in Sn-rich phase (point A) and decreases in layered structure (point B).…”

supporting

confidence: 52%

“…7,8 Microalloying is an effective method for controlling the composition distribution, microstructure characteristics and comprehensive properties of Cu-15Ni-8Sn alloys. 9,10 For instance, Guo et al found that when the V content increased from 0 to 1.0 wt-%, the as-cast grain size of Cu-15Ni-8Sn-xV alloy decreased from 762 to 30 μm. In the Cu-15Ni-8Sn-0.4V alloy, the growth of DP was inhibited by the pinning effect of Ni 3 V particles on the grain boundary.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 67%

supporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…The results showed that DP can be successfully inhibited by these elements' addition. In addition, the addition of Ti [12], Si [13,14], Nb [15,16] , V [17], and Fe [18] can also effectively prevent the formation of DP in the Cu-15Ni-8Sn alloy. Research on the impact of micro-alloying on the Cu-15Ni-8Sn alloy's stress relaxation resistance is rare, though.…”

Section: Introductionmentioning

confidence: 99%

Effect of Co/P micro-alloying on stress relaxation behaviour of Cu-15Ni-8Sn alloy

Gong

Guo

Huang

et al. 2023

Materials Science and Technology

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To improve the stress relaxation resistance of the Cu-5Ni-S8n alloy, the effects of Co or P addition on its stress relaxation resistance were investigated by scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction), X-ray diffraction, and high-temperature creep durability tester. The results revealed that the relaxation rate increased dramatically as the temperature rose. The thermal stress relaxation resistance of Cu-15Ni-8Sn alloy was significantly improved with Co addition; After 100 h of stress relaxation tests at 200°C or 250°C, the residual stress value of the Cu-15Ni-8Sn alloy increased by 23 MPa or 22 MPa with Co addition, which was associated with the consumption of vacancies by Co atoms and the pinning effect of Co atoms on dislocation. However, at 250°C, the stress relaxation resistance of the Cu-15Ni-8Sn-0.2P alloy was lower than that of the Cu-15Ni-8Sn alloy. This difference was due to the inclusion of P, which promoted the recrystallization reaction. Article highlights Recrystallization and the decrease of dislocation density are the major reasons for the stress relaxation of the samples. The stress relaxation resistance of Cu-15Ni-8Sn alloy was significantly improved with Co addition. The addition of the P element is not conducive to the improvement of thermal stress relaxation resistance.

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“…Alloying elements added into the copper-nickel-tin alloys can affect the microstructures of the alloys, causing the mechanical properties of the alloys to vary [13][14][15][16][17][18][19][20][21]. 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].…”

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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Inhibition of discontinuous precipitation and enhanced properties of Cu–15Ni–8Sn alloy with Fe addition

Cited by 46 publications

References 27 publications

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

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

Effect of Co/P micro-alloying on stress relaxation behaviour 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

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