Abstract
High strength and high conductivity (HSHC) Cu alloys are widely used in many fields, such as high-speed electric railway contact wires and integrated circuit lead frames. Pure Cu is well known to have excellent electrical conductivity but rather low strength. The main concern of HSHC Cu alloys is how to strengthen the alloy efficiently. However, when the Cu alloys are strengthened by a certain method, their electrical conductivity will inevitably decrease to a certain extent. This review introduces the strengthening methods of HSHC Cu alloys. Then the research progress of some typical HSHC Cu alloys such as Cu-Cr-Zr, Cu-Ni-Si, Cu-Ag, Cu-Mg is reviewed according to different alloy systems. Finally, the development trend of HSHC Cu alloys is forecasted. It is pointed out that precipitation and micro-alloying are effective ways to improve the performance of HSHC Cu alloys. At the same time, the production of HSHC Cu alloys also needs to comply with the large-scale, low-cost development trend of industrialization in the future.
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Lu L, Shen Y, Chen X, et al. Ultrahigh strength and high electrical conductivity in copper. Science, 2004, 304: 422–426
Zhao Z, Zhang Y, Tian B, et al. Co effects on Cu-Ni-Si alloys microstructure and physical properties. J Alloys Compd, 2019, 797: 1327–1337
Guo X, Xiao Z, Qiu W, et al. Microstructure and properties of Cu-Cr-Nb alloy with high strength, high electrical conductivity and good softening resistance performance at elevated temperature. Mater Sci Eng A, 2019, 749: 281–290
Li R, Zhang S, Zou C, et al. The roles of Hf element in optimizing strength, ductility and electrical conductivity of copper alloys. Mater Sci Eng-A, 2019, 758: 130–138
Zhou S J, Zhao B J, Zhao Z, et al. Application of lanthanum in high strength and high conductivity copper alloys. J Rare Earths, 2006, 24: 385–388
Rupert T J, Trenkle J C, Schuh C A. Enhanced solid solution effects on the strength of nanocrystalline alloys. Acta Mater, 2011, 59: 1619–1631
Batra I S, Dey G K, Kulkarni U D, et al. Microstructure and properties of a Cu-Cr-Zr alloy. J Nucl Mater, 2001, 299: 91–100
Liu Q, Cheng L. Structural evolution and electronic properties of Cu-Zn alloy clusters. J Alloys Compd, 2019, 771: 762–768
Hall E O. The deformation and ageing of mild steel: III discussion of results. Proc Phys Soc London Sect B, 1951, 64: 747
Petch N J. The cleavage strength of polycrystals. J Iron Steel Inst, 1953, 174: 25–28
Liu W, Yan N, Wang H P. Dendritic morphology evolution and microhardness enhancement of rapidly solidified Ni-based superalloys. Sci China Tech Sci, 2019, 62: 1976–1986
Li R, Guo E, Chen Z, et al. Optimization of the balance between high strength and high electrical conductivity in CuCrZr alloys through two-step cryorolling and aging. J Alloys Compd, 2019, 771: 1044–1051
Zhang M, Liu G Q, Wang H, et al. Stability of γ′ multimodal microstructure in a Ni-based powder metallurgy superalloy. Sci China Tech Sci, 2018, 61: 1824–1828
Purcek G, Yanar H, Demirtas M, et al. Microstructural, mechanical and tribological properties of ultrafine-grained Cu-Cr-Zr alloy processed by high pressure torsion. J Alloys Compd, 2020, 816: 152675
Misra R D K, Prasad V S, Rao P R. Dynamic embrittlement in an age-hardenable copper-chromium alloy. Scripta Mater, 1996, 35: 129–133
Batawi E, Morris D G, Morris M A. Effect of small alloying additions on behaviour of rapidly solidified CuCr alloys. Met Sci J, 1990, 6: 892–899
Kuznetsov G, Fedorov V, Rodnyanskaya A. Phase diagram of the Cu-Cr system. Izv VUZ Tsvetn Metall, 1977, 3: 84–86
Hatakeyama M, Toyama T, Nagai Y, et al. Nanostructural evolution of Cr-rich precipitates in a Cu-Cr-Zr alloy during heat treatment studied by 3 dimensional atom probe. Mater Trans, 2008, 49: 518–521
Zhang S, Li R, Kang H, et al. A high strength and high electrical conductivity Cu-Cr-Zr alloy fabricated by cryorolling and intermediate aging treatment. Mater Sci Eng-A, 2017, 680: 108–114
Holzwarth U, Stamm H. The precipitation behaviour of ITER-grade Cu-Cr-Zr alloy after simulating the thermal cycle of hot isostatic pressing. J Nucl Mater, 2000, 279: 31–45
Huang F, Ma J, Ning H, et al. Analysis of phases in a Cu-Cr-Zr alloy. Scripta Mater, 2003, 48: 97–102
Kermajani M, Raygan S, Hanayi K, et al. Influence of thermomechanical treatment on microstructure and properties of electroslag remelted Cu-Cr-Zr alloy. Mater Des, 2013, 51: 688–694
Xia C, Jia Y, Zhang W, et al. Study of deformation and aging behaviors of a hot rolled-quenched Cu-Cr-Zr-Mg-Si alloy during thermomechanical treatments. Mater Des, 2012, 39: 404–409
Fu H, Xu S, Li W, et al. Effect of rolling and aging processes on microstructure and properties of Cu-Cr-Zr alloy. Mater Sci Eng-A, 2017, 700: 107–115
Sun L X, Tao N R, Lu K. A high strength and high electrical conductivity bulk CuCrZr alloy with nanotwins. Scripta Mater, 2015, 99: 73–76
Li R, Kang H, Chen Z, et al. A promising structure for fabricating high strength and high electrical conductivity copper alloys. Sci Rep, 2016, 6: 20799
Mishnev R, Shakhova I, Belyakov A, et al. Deformation microstructures, strengthening mechanisms, and electrical conductivity in a Cu-Cr-Zr alloy. Mater Sci Eng-A, 2015, 629: 29–40
Morozova A, Kaibyshev R. Grain refinement and strengthening of a Cu-0.1Cr-0.06Zr alloy subjected to equal channel angular pressing. Philos Mag, 2017, 97: 2053–2076
Purcek G, Yanar H, Demirtas M, et al. Optimization of strength, ductility and electrical conductivity of Cu-Cr-Zr alloy by combining multi-route ECAP and aging. Mater Sci Eng-A, 2016, 649: 114–122
Liang N, Liu J, Lin S, et al. A multiscale architectured CuCrZr alloy with high strength, electrical conductivity and thermal stability. J Alloys Compd, 2018, 735: 1389–1394
Zhang Y, Tian B, Volinsky A A, et al. Microstructure and precipitate’s characterization of the Cu-Ni-Si-P alloy. J Materi Eng Perform, 2016, 25: 1336–1341
Liu J, Hou M, Yang H, et al. In-situ TEM study of the dynamic interactions between dislocations and precipitates in a Cu-Cr-Zr alloy. J Alloys Compd, 2018, 765: 560–568
Shangina D V, Bochvar N R, Morozova A I, et al. Effect of chromium and zirconium content on structure, strength and electrical conductivity of Cu-Cr-Zr alloys after high pressure torsion. Mater Lett, 2017, 199: 46–49
Wang Y, Fu R, Li Y, et al. A high strength and high electrical conductivity Cu-Cr-Zr alloy fabricated by cryogenic friction stir processing and subsequent annealing treatment. Mater Sci Eng-A, 2019, 755: 166–169
Huang A H, Wang Y F, Wang M S, et al. Optimizing the strength, ductility and electrical conductivity of a Cu-Cr-Zr alloy by rotary swaging and aging treatment. Mater Sci Eng-A, 2019, 746: 211–216
Corson M. Copper alloy systems with variable alpha range and their use in the hardening of copper. AIME Trans, 1927, E27: 435–450
Robertson W, Grenier E, Nole V. The structure and associated properties of an age hardening Cu alloy. Trans Metall Soc AIME, 1961, 221: 503
Donoso E, Espinoza R, Diánez M J, et al. Microcalorimetric study of the annealing hardening mechanism of a Cu-2.8Ni-1.4Si (at%) alloy. Mater Sci Eng-A, 2012, 556: 612–616
Jia Y, Wang M, Chen C, et al. Orientation and diffraction patterns of δ-Ni2Si precipitates in Cu-Ni-Si alloy. J Alloys Compd, 2013, 557: 147–151
Hu T, Chen J H, Liu J Z, et al. The crystallographic and morphological evolution of the strengthening precipitates in Cu-Ni-Si alloys. Acta Mater, 2013, 61: 1210–1219
Azzeddine H, Mehdi B, Hennet L, et al. An in situ synchrotron X-ray diffraction study of precipitation kinetics in a severely deformed Cu-Ni-Si alloy. Mater Sci Eng-A, 2014, 597: 288–294
Okamoto M. The investigation of the equilibrium state of the ternary whole system copper-nickel-silicon. III. J Jpn Inst Met, 1939, 3: 365–402
Zhao D M, Dong Q M, Liu P, et al. Structure and strength of the age hardened Cu-Ni-Si alloy. Mater Chem Phys, 2003, 79: 81–86
Cheng J Y, Tang B B, Yu F X, et al. Evaluation of nanoscaled precipitates in a Cu-Ni-Si-Cr alloy during aging. J Alloys Compd, 2014, 614: 189–195
Lei Q, Li Z, Dai C, et al. Effect of aluminum on microstructure and property of Cu-Ni-Si alloys. Mater Sci Eng-A, 2013, 572: 65–74
Monzen R, Watanabe C. Microstructure and mechanical properties of Cu-Ni-Si alloys. Mater Sci Eng-A, 2008, 483–484: 117–119
Li M, Zinkle S J. Physical and mechanical properties of copper and copper alloys. Compr Nucl Mater, 2012, 4: 667–690
Kuhn H A. Properties of high performance alloys for electromechanical connectors. In: Cu Alloys-Early Applications and Current Performance-Enhancing Processes. InTech., 2012. 51–68
Watanabe C, Takeshita S, Monzen R. Effects of small addition of Ti on strength and microstructure of a Cu-Ni-Si alloy. Metall Mat Trans A, 2015, 46: 2469–2475
Han S Z, Gu J H, Lee J H, et al. Effect of V addition on hardness and electrical conductivity in Cu-Ni-Si alloys. Met Mater Int, 2013, 19: 637–641
Wang W, Kang H, Chen Z, et al. Effects of Cr and Zr additions on microstructure and properties of Cu-Ni-Si alloys. Mater Sci Eng-A, 2016, 673: 378–390
Khereddine A Y, Larbi F H, Kawasaki M, et al. An examination of microstructural evolution in a Cu-Ni-Si alloy processed by HPT and ECAP. Mater Sci Eng-A, 2013, 576: 149–155
Li D, Wang Q, Jiang B, et al. Minor-alloyed Cu-Ni-Si alloys with high hardness and electric conductivity designed by a cluster formula approach. Prog Nat Sci-Mater Int, 2017, 27: 467–473
Lei Q, Li Z, Xiao T, et al. A new ultrahigh strength Cu-Ni-Si alloy. Intermetallics, 2013, 42: 77–84
Lei Q, Xiao Z, Hu W, et al. Phase transformation behaviors and properties of a high strength Cu-Ni-Si alloy. Mater Sci Eng-A, 2017, 697: 37–47
Wang H S, Chen H G, Gu J W, et al. Effects of heat treatment processes on the microstructures and properties of powder metallurgy produced Cu-Ni-Si-Cr alloy. Mater Sci Eng-A, 2014, 619: 221–227
Gholami M, Vesely J, Altenberger I, et al. Effects of microstructure on mechanical properties of CuNiSi alloys. J Alloys Compd, 2017, 696: 201–212
Watanabe H, Kunimine T, Watanabe C, et al. Tensile deformation characteristics of a Cu-Ni-Si alloy containing trace elements processed by high-pressure torsion with subsequent aging. Mater Sci Eng-A, 2018, 730: 10–15
Liao W, Liu X, Yang Y, et al. Effect of cold rolling reduction rate on mechanical properties and electrical conductivity of Cu-Ni-Si alloy prepared by temperature controlled mold continuous casting. Mater Sci Eng-A, 2019, 763: 138068
Huang J, Xiao Z, Dai J, et al. Microstructure and properties of a novel Cu-Ni-Co-Si-Mg alloy with super-high strength and conductivity. Mater Sci Eng-A, 2019, 744: 754–763
Freudenberger J, Grünberger W, Botcharova E, et al. Mechanical properties of Cu-based micro- and macrocomposites. Adv Eng Mater, 2002, 4: 677–681
Benghalem A, Morris D G. Microstructure and strength of wiredrawn Cu-Ag filamentary composites. Acta Mater, 1997, 45: 397–406
Tian Y Z, Zhang Z F. Stability of interfaces in a multilayered Ag-Cu composite during cold rolling. Scripta Mater, 2013, 68: 542–545
Sakai Y, Schneider-Muntau H J. Ultra-high strength, high conductivity Cu-Ag alloy wires. Acta Mater, 1997, 45: 1017–1023
Sakai Y, Inoue K, Asano T, et al. Development of high-strength, high-conductivity Cu-Ag alloys for high-field pulsed magnet use. Appl Phys Lett, 1991, 59: 2965–2967
Sakai Y, Inoue K, Maeda H. New high-strength, high-conductivity Cu-Ag alloy sheets. Acta Metall Mater, 1995, 43: 1517–1522
Tian Y Z, Zhang Z F. Bulk eutectic Cu-Ag alloys with abundant twin boundaries. Scripta Mater, 2012, 66: 65–68
Tian Y Z, Wu S D, Zhang Z F, et al. Microstructural evolution and mechanical properties of a two-phase Cu-Ag alloy processed by high-pressure torsion to ultrahigh strains. Acta Mater, 2011, 59: 2783–2796
Tian Y Z, Wu S D, Zhang Z F, et al. Comparison of microstructures and mechanical properties of a Cu-Ag alloy processed using different severe plastic deformation modes. Mater Sci Eng-A, 2011, 528: 4331–4336
Freudenberger J, Lyubimova J, Gaganov A, et al. Non-destructive pulsed field CuAg-solenoids. Mater Sci Eng-A, 2010, 527: 2004–2013
Chang L L, Wen S, Li S L, et al. Strain softening during tension in cold drawn Cu-Ag alloys. Mater Charact, 2015, 108: 145–151
Bernasconi R, Hart J L, Lang A C, et al. Structural properties of electrodeposited Cu-Ag alloys. Electrochim Acta, 2017, 251: 475–481
Bao G, Xu Y, Huang L, et al. Strengthening effect of Ag precipitates in Cu-Ag alloys: A quantitative approach. Mater Res Lett, 2016, 4: 37–42
Zhang L, Meng L. Microstructure and properties of Cu-Ag, Cu-Ag-Cr and Cu-Ag-Cr-RE alloys. Mater Sci Tech, 2003, 19: 75–79
Liu J B, Zeng Y W, Meng L. Crystal structure and morphology of a rare-earth compound in Cu-12wt.% Ag. J Alloys Compd, 2009, 468: 73–76
Zeng Y, Mu S, Wu P, et al. Relative effects of all chemical elements on the electrical conductivity of metal and alloys: An alternative to Norbury-Linde rule. J Alloys Compd, 2009, 478: 345–354
Dahl O. Über die struktur und die vergütbarkeit der Cu-reichen Cu-Mg-und Cu-Mg-Sn-legierungen. Wiss Veröffentl Siemens-Konzern, 1927, 6: 222–234
Böhm H. On precipitation behavior of binary Cu alloys and its influence due to alloying. Z Melallk, 1961, 52: 564–571
Tsubakino H, Nozato R. Discontinuous precipitation in Cu-Mg alloys. J Mater Sci-Mater Electron, 1984, 19: 3013–3020
Coughanowr C. Assessment of the Cu-Mg system. Zeitschrift fur Metallkunde, 1991, 82: 574–581
Buhler T, Fries S G, Spencer P J, et al. A thermodynamic assessment of the Al-Cu-Mg ternary system. J Phase Equil, 1998, 19: 317–333
Gorsse S, Shiflet G J. A thermodynamic assessment of the Cu-Mg-Ni ternary system. Calphad, 2002, 26: 63–83
Gorsse S, Ouvrard B, Gouné M, et al. Microstructural design of new high conductivity-high strength Cu-based alloy. J Alloys Compd, 2015, 633: 42–47
Ma A, Zhu C, Chen J, et al. Grain refinement and high-performance of equal-channel angular pressed Cu-Mg alloy for electrical contact wire. Metals, 2014, 4: 586–596
Zhu C, Ma A, Jiang J, et al. Effect of ECAP combined cold working on mechanical properties and electrical conductivity of Conform-produced Cu-Mg alloys. J Alloys Compd, 2014, 582: 135–140
Li Y, Xiao Z, Li Z, et al. Microstructure and properties of a novel Cu-Mg-Ca alloy with high strength and high electrical conductivity. J Alloys Compd, 2017, 723: 1162–1170
Kozlenkova N I, Pantsyrnyi V I, Nikulin A D, et al. Electrical conductivity of high-strength Cu-Nb microcomposites. IEEE Trans Magn, 1996, 32: 2921–2924
Thilly L, Lecouturier F, Coffe G, et al. Ultra high strength nanocomposite conductors for pulsed magnet windings. IEEE Trans Appl Supercond, 2000, 10: 1269–1272
Misra A, Thilly L. Structural metals at extremes. MRS Bull, 2010, 35: 965–977
Raabe D, Choi P P, Li Y, et al. Metallic composites processed via extreme deformation: Toward the limits of strength in bulk materials. MRS Bull, 2010, 35: 982–991
Thilly L, Lecouturier F, Coffe G, et al. Ultra high strength nanofilamentary conductors: the way to reach extreme properties. Phys B-Condensed Matter, 2001, 294–295: 648–652
Hong S I, Hill M A. Mechanical and electrical properties of heavily drawn Cu-Nb microcomposites with various Nb contents. J Mater Sci, 2002, 37: 1237–1245
Pantsyrnyi V I. Status and perspectives for microcomposite winding materials for high field pulsed magnets. IEEE Trans Appl Supercond, 2002, 12: 1189–1194
Pelton A R, Laabs F C, Spitzig W A, et al. Microstructural analysis of in-situ Cu-Nb composite wires. Ultramicroscopy, 1987, 22: 251–265
Vidal V, Thilly L, Vanpetegem S, et al. Plasticity of nanostructured Cu-Nb-based wires: Strengthening mechanisms revealed by in situ deformation under neutrons. Scripta Mater, 2009, 60: 171–174
Sandim H R Z, Sandim M J R, Bernardi H H, et al. Annealing effects on the microstructure and texture of a multifilamentary Cu-Nb composite wire. Scripta Mater, 2004, 51: 1099–1104
Vidal V, Thilly L, Lecouturier F, et al. Effects of size and geometry on the plasticity of high-strength copper/tantalum nanofilamentary conductors obtained by severe plastic deformation. Acta Mater, 2006, 54: 1063–1075
Liang M, Lu Y F, Chen Z L, et al. Characteristics of high strength and high conductivity Cu-Nb micro-composites. IEEE Trans Appl Supercond, 2010, 20: 1619–1621
Botcharova E, Freudenberger J, Schultz L. Cu-Nb alloys prepared by mechanical alloying and subsequent heat treatment. J Alloys Compd, 2004, 365: 157–163
Lei R S, Wang M P, Li Z, et al. Structure evolution and solid solubility extension of copper-niobium powders during mechanical alloying. Mater Sci Eng-A, 2011, 528: 4475–4481
Lei R, Xu S, Wang M, et al. Microstructure and properties of nanocrystalline copper-niobium alloy with high strength and high conductivity. Mater Sci Eng-A, 2013, 586: 367–373
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This work was supported by the National Key R&D Program of China (Grant No. 2017YFB1200800), the National Natural Science Foundation of China (Grant Nos. 11725210, 51827810 and 51637009), the Fundamental Research Funds for the Central Universities (Grant No. 2018XZZX001-05), and the Zhejiang Xinmiao Talent Projects.
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Yang, H., Ma, Z., Lei, C. et al. High strength and high conductivity Cu alloys: A review. Sci. China Technol. Sci. 63, 2505–2517 (2020). https://doi.org/10.1007/s11431-020-1633-8
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DOI: https://doi.org/10.1007/s11431-020-1633-8