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.
HustonELCahnJWHilliardJE. Spinodal decomposition during continuous cooling. Acta Metall1966; 14: 1053–1062.
2.
LefevreBGD’annessaATKalishD. Age hardening in Cu–15Ni–8Sn alloy. Metall Trans A1978; 9: 577–586.
3.
JohnsenRLangeTStenerudG, et al.Environmentally assisted degradation of spinodal copper alloy C72900. Corros Sci2018; 142: 45–55.
4.
LiJZhangZXuW, et al.Hot isostatic pressing of Cu–15Ni–8Sn alloy with suppressed Sn macro-segregation and enhanced mechanical properties. Mater Sci Eng A2022; 855: 143866.
5.
YangSSongKZhouY, et al.Research progress on Cu–15Ni–8Sn alloys: the effect of microalloying and heat treatment on microstructure and properties. Materials2023; 16: 5913.
6.
SankarBVinayCVishnuJ, et al.Focused review on Cu–Ni–Sn spinodal alloys: from casting to additive manufacturing. Met Mater Int2023; 29: 1203–1228.
7.
DeyongLTremblayRAngersR. Microstructural and mechanical properties of rapidly solidified Cu–Ni–Sn alloys. Mater Sci Eng A1990; 124: 223–231.
8.
LiuZZhaoDWangP, et al.Additive manufacturing of metals: microstructure evolution and multistage control. J Mater Sci Technol2022; 100: 224–236.
9.
LiuSGuoZZhangS, et al.Effect of B addition on microstructures and properties of Cu–15Ni–8Sn alloy. J Alloys Compd2023; 947: 169644.
10.
GuoCWanJChenJ, et al.Inhibition of discontinuous precipitation and enhanced properties of Cu–15Ni–8Sn alloy with Fe addition. Mater Sci Eng A2020; 795: 139917.
11.
GuoZJieJLiuS, et al.Effect of V addition on microstructures and mechanical properties of Cu–15Ni–8Sn alloy. Mater Sci Eng A2019; 748: 85–94.
12.
GuoCChenJXiaoX, et al.The effect of Co addition on the modulated structure coarsening and discontinuous precipitation growth kinetics of Cu–15Ni–8Sn alloy. J Alloys Compd2020; 835: 155275.
13.
ZhangJLiuZGuoZ, et al.Effects of Zr on microstructural evolution and mechanical property of Cu–15Ni–8Sn alloy. Mater Sci Eng A2022; 831: 142287.
14.
GuoCShiYChenJ, et al.Effects of P addition on spinodal decomposition and discontinuous precipitation in Cu–15Ni–8Sn alloy. Mater Charact2021; 171: 110760.
15.
LuoBLiDZhaoC, et al.A low Sn content Cu-Ni-Sn alloy with high strength and good ductility. Mater Sci Eng A2019; 746: 154–161.
16.
WangBZhangYTianB, et al.Effects of Ce and Y addition on microstructure evolution and precipitation of Cu–Mg alloy hot deformation. J Alloys Compd2019; 781: 118–130.
17.
WangWZhuJQinN, et al.Effects of minor rare earths on the microstructure and properties of Cu–Cr–Zr alloy. J Alloys Compd2020; 847: 155762.
18.
HantzscheKBohlenJWendtJ, et al.Effect of rare earth additions on microstructure and texture development of magnesium alloy sheets. Scr Mater2010; 63: 725–730.
19.
LiuHTengXWuW, et al.Effects of rare earth Y addition on microstructural and properties of pure copper. Mater Sci Forum2018; 913: 862–869.
20.
Movahedi-RadAMahmudiRWuGH, et al.Enhanced superplasticity in an extruded high strength Mg–Gd–Y–Zr alloy with Ag addition . J Alloys Compd2015; 626: 309–313.
21.
BaeDHKimSHKimDH, et al.Deformation behavior of Mg–Zn–Y alloys reinforced by icosahedral quasicrystalline particles. Acta Mater2002; 50: 2343–2356.
22.
DingWZhaoXChenT, et al.Effect of rare earth Y and Al–Ti–B master alloy on the microstructure and mechanical properties of 6063 aluminum alloy. J Alloys Compd2020; 830: 154685.
23.
WangMFXiaoDHZhouPF, et al.Effects of rare earth yttrium on microstructure and properties of MgAlZn alloy. J Alloys Compd2018; 742: 232–239.
24.
ChengJGaoYZhangZ, et al.Effect of yttrium on the cellular precipitation kinetics, grain growth behavior and mechanical properties of high strength Cu–15Ni–8Sn alloy. J Alloys Compd2022; 918: 165408.
25.
LiuD-DZhouY-JYangR, et al.Effect of electromagnetic stirring current on the mechanical properties of Cu–15Ni–8Sn alloy and its mechanism of inducing dendrite refinement and Sn distribution homogenization. Mater Today Commun2023; 37: 107224.
26.
GuoZJieJLiuJ, et al.Effect of cold rolling on aging precipitation behavior and mechanical properties of Cu–15Ni–8Sn alloy . J Alloys Compd2020; 848: 156275.
27.
GuoZJieJYueS, et al.Microstructure evolution of Cu–15Ni–8Sn alloy prepared by vertical semi-continuous casting with EMS. IOP Conf Ser: Mater Sci Eng2018; 424: 012073.
28.
ZhaoJ-CNotisMRJAM. Spinodal decomposition, ordering transformation, and discontinuous precipitation in a Cu–15Ni–8Sn alloy. Acta Mater1998; 46: 4203–4218.
29.
WangNShenYAnQ, et al.Microstructure evolution and mechanical property of Cu–15Ni–8Sn–0.2Nb alloy during aging treatment. J Mater Sci Technol2021; 86: 227–236.
30.
GuoZJieJLiuS, et al.Solidification characteristics and segregation behavior of Cu–15Ni–8Sn alloy. Metall Mater Trans A2020; 51: 1229–1241.
31.
ZhangKZhangLShuC, et al.Effect of different Mo addition on microstructure and mechanical properties of Cu–15Ni–8Sn alloy. Materials2022; 15: 5521.
32.
ZhangJGuoZJieJ, et al.Evolution behavior of γ-D03 phase in Cu–15Ni–8Sn alloy and the corresponding effects on alloy property. J Alloys Compd2022; 897: 162736.
33.
FurthmüllerJHafnerJKresseG. Ab initio calculation of the structural and electronic properties of carbon and boron nitride using ultrasoft pseudopotentials. Phys Rev B1994; 50: 15606–15622.
34.
DongWKresseGFurthmüllerJ, et al.Chemisorption of H on Pd(111): an ab initio approach with ultrasoft pseudopotentials. Phys Rev B1996; 54: 2157–2166.
35.
KresseGJoubertD. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys Rev B1999; 59: 1758–1775.
36.
LeeseJLordAEJr. Elastic stiffness coefficients of single-crystal iron from room temperature to 500°C. J Appl Phys1968; 39: 3986–3988.
37.
VinetPRoseJHFerranteJ, et al.Universal features of the equation of state of solids. J Phys: Condens Matter1989; 1: 1941.
38.
XuJLiuJ-BLiS, et al.Self-healing properties of nanocrystalline materials: a first-principles analysis of the role of grain boundaries. Phys Chem Chem Phys2016; 18: 17930–17940.
39.
JamesAMLordMP. Macmillan's Chemical and Physical Data, F. 1992.
40.
GhoshG. First-principles calculations of structural energetics of Cu–TM (TM=Ti, Zr, Hf) intermetallics . Acta Mater2007; 55: 3347–3374.
41.
LiuGZhangJDouY. First-principles study of solute–solute binding in magnesium alloys. Comput Mater Sci2015; 103: 97–104.
42.
ZurekE. Discovering New Materials via A Priori Crystal Structure Prediction. 2016: 274–326.
43.
SunWDacekSTOngSP, et al.The thermodynamic scale of inorganic crystalline metastability. Sci Adv2016; 2: e1600225.
44.
YangRWenJZhouY, et al.Effect of Al element on the microstructure and properties of Cu–Ni–Fe–Mn alloys. Materials2018; 11: 1777.
45.
ShenZZhouBZhongJ, et al.Evolutions of the micro- and macrostructure and tensile property of Cu–15Ni–8Sn alloy during electromagnetic stirring-assisted horizontal continuous casting. Metall Mater Trans B2019; 50: 2111–2120.
46.
AliliBBradaiDZiebaP. On the discontinuous precipitation reaction and solute redistribution in a Cu–15%Ni–8%Sn alloy. Mater Charact2008; 59: 1526–1530.
