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Acta Metall Sin  2017, Vol. 53 Issue (2): 183-191    DOI: 10.11900/0412.1961.2016.00358
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Strain Rate Sensitivity of Cu/Ni and Cu/NbNanoscale Multilayers
Yao WANG,Xiaoying ZHU(),Guimin LIU,Jun DU
Department of Equipment Remanufacturing Engineering, Academy of Armored Forces Engineering, Beijing 100072, China
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Different from monolayers of same components, nanoscale multilayers have different mechanical properties owing to their relatively high interfacial density, such as extremely high yield strength, high ductility and outstanding wear resistance. Furthermore, their precise modulation period and unique interfacial structures contribute to investigate the plastic deformation mechanism of metal materials. As the plastic deformation behaviors of nanoscale multilayers were reflected in a thermal activation process, strain rate sensitivity index m can be used to characterize the tendency of material strengthening as the strain rate increases. To investigate the impacts of modulation period and interfacial structures upon strain rate sensitivity of nanoscale multilayers, Cu/Ni nanoscale multilayers with different periods (Λ=4 nm, 12 nm, 20 nm) were prepared on Si substrate with e-beam evaporation technologies, while Cu/Nb nanoscale multilayers with different periods (Λ=5 nm, 10 nm, 20 nm) were prepared on Si substrate with magnetron sputtering technologies. Under vacuum conditions, the Cu/Ni nanoscale multilayers of different periods were annealed at 200 and 400 ℃ for 4 h respectively, and the Cu/Nb nanoscale multilayers of different periods were annealed at 200, 400 ℃ and 600 ℃ for 4 h respectively. Microstructures of Cu/Ni and Cu/Nb nanoscale multilayers were characterized with XRD and TEM. Besides, the hardness of nanoscale multilayers was measured by nano-indentation techniques under different loading strain rates (including 0.005, 0.01, 0.05 and 0.2 s-1). The results suggested that strain rate sensitivity was impacted by interfacial structures and grain size. Both increased density of incoherent interfaces and grain size could result in weaker strain rate sensitivity. As the period increases, the density of incoherent interfaces and the grain size of Cu/Ni nanoscale multilayers increased, leading to a decline in the strain rate sensitivity. While for Cu/Nb nano scale multilayers, the density of incoherent interfaces decreased and their grain size was enlarged with longer period, the m value kept unchanged as a result. As the annealing temperature increasing, the strain rate sensitivity of Cu/Ni and Cu/Nb nanoscale multilayers generally tended to decline, which should be ascribed to increased density of incoherent interfaces and grain size in the course of annealing.

Key words:  nanoscale      multilayer,      period,      interface      structure,      strain      rate      sensitivity     
Received:  05 August 2016     
Fund: Supported by National Natural Science Foundation of China (Nos.51401238 and 51102283)

Cite this article: 

Yao WANG,Xiaoying ZHU,Guimin LIU,Jun DU. Strain Rate Sensitivity of Cu/Ni and Cu/NbNanoscale Multilayers. Acta Metall Sin, 2017, 53(2): 183-191.

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Fig.1  XRD spectra of as deposited (a) and as annealed (b~d) Cu/Ni nanoscale multilayers with Λ=4 nm (b), Λ=12 nm (c) and Λ=20 nm (d) (Λ―period)
Fig.2  XRD spectra of as deposited (a) and as annealed (b~d) Cu/Nb nanoscale multilayers with Λ=5 nm (b), Λ=10 nm (c) and Λ=20 nm (d)
Fig.3  Cross-sectional TEM (a, c) and HRTEM (b, d) images of as deposited (a, b) and 400 ℃ annealed (c, d) Cu/Ni nanoscale multilayers with Λ=12 nm (Inset in Fig.3a shows the SAED patterns, and insets in Figs.3b and d show the inverse fast Flourier transform images)
Fig.4  Cross-sectional TEM images of as deposited Cu/Nb nanoscale multilayers with Λ=5 nm (a) and Λ=20 nm (b), and EDS map scanning morphologies of Cu (c) and Nb (d) elements in the sample with Λ=20 nm (Inset in Fig.4b shows the corresponding SAED pattern)
Fig.5  Strain rate sensitivity m of Cu/Ni nanoscale multilayers with Λ=4, 12 and 20 nm annealed at different temperatures
Fig.6  m of Cu/Nb nanoscale multilayers with Λ=5, 10 and 20 nm annealed at different temperatures
[1] Li M J, Liu X L, Liu Y T, et al.Texture evolution and mechanical properties of Mg/Al multilayered composite sheets processed by accumulative roll bonding[J]. Acta Metall. Sin., 2016, 52: 463
[1] (李眉娟, 刘晓龙, 刘蕴韬等. 累积叠轧Mg/Al多层复合板材的织构演变及力学性能[J]. 金属学报, 2016, 52: 463)
[2] Niu J J, Zhang J Y, Liu G, et al.Size-dependent deformation mechanisms and strain-rate sensitivity in nanostructured Cu/X (X=Cr, Zr) multilayer films[J]. Acta Mater., 2012, 60: 3677
[3] Meyers M A, Mishra A, Benson D J.Mechanical properties of nanocrystalline materials[J]. Prog. Mater. Sci., 2006, 51: 427
[4] Misra A, Krug H.Deformation behavior of nanostructured metallic multilayers[J]. Adv. Eng. Mater., 2001, 3: 217
[5] Lehoczky S L.Strength enhancement in thin-layered Al-Cu laminates[J]. J. Appl. Phys., 1978, 49: 5479
[6] Zhang J Y, Wang Y Q, Wu K, et al.Strain rate sensitivity of nanolayered Cu/X (X=Cr, Zr) micropillars: Effects of heterophase interface/twin boundary[J]. Mater. Sci. Eng., 2014, A612: 28
[7] Huang P, Wang F, Xu M, et al.Strain rate sensitivity of unequal grained nano-multilayers[J]. Mater. Sci. Eng., 2011, A528: 5908
[8] Lu Y Y, Kotoka R, Ligda J P, et al.The microstructure and mechanical behavior of Mg/Ti multilayers as a function of individual layer thickness[J]. Acta Mater., 2014, 63: 216
[9] Zhou Q, Li J J, Wang F, et al.Strain rate sensitivity of Cu/Ta multilayered films: Comparison between grain boundary and heterophase interface[J]. Scr. Mater., 2016, 111: 123
[10] Zhu X Y.Research on the interfacial structure and mechanical properties of some nanoscale metallic multilayers [D]. Beijing: Ts
[10] inghua University, 2010
[10] (朱晓莹. 若干金属纳米多层膜界面结构及力学性能研究 [D]. 北京: 清华大学, 2010)
[11] Zhu X Y, Liu X J, Zong R L, et al.Microstructure and mechanical properties of nanoscale Cu/Ni multilayers[J]. Mater. Sci. Eng., 2010, A527: 1243
[12] Liu Y, Bufford D, Wang H, et al.Mechanical properties of highly textured Cu/Ni multilayers[J]. Acta Mater., 2011, 59: 1924
[13] Wang Y, Zhu X Y, Du J, et al.Microstructural and mechanical stability of Cu/Ni nanoscale multilayers at different annealing temperatures[J]. China Surf. Eng., 2016, 29(3): 14
[13] (王尧, 朱晓莹, 杜军等. 不同退火温度下Cu/Ni纳米多层膜的结构与力学性能稳定性[J]. 中国表面工程, 2016, 29(3): 14)
[14] Demkowicz M J, Hoagland R G, Hirth J P.Interface structure and radiation damage resistance in Cu-Nb multilayer nanocomposites[J]. Phys. Rev. Lett., 2008, 100: 136102
[15] Wen S P, Zong R L, Zeng F, et al.Thermal stability of microstructure and mechanical properties of Ni/Ru multilayers[J]. Surf. Coat. Tech., 2008, 202: 2040
[16] Raghavan R, Bechelany M, Parlinska M, et al.Nanocrystalline-to-amorphous transition in nanolaminates grown by low temperature atomic layer deposition and related mechanical properties[J]. Appl. Phys. Lett., 2012, 100: 191912
[17] Zhou Q, Wang F, Huang P, et al.Strain rate sensitivity and related plastic deformation mechanism transition in nanoscale Ag/W multilayers[J]. Thin Solid Films, 2014, 571: 253
[18] Zhou Q, Zhao J, Xie J Y, et al.Grain size dependent strain rate sensitivity in nanocrystalline body-centered cubic metal thin films[J]. Mater. Sci. Eng., 2014, A608: 184
[19] de Hosson J T M, Groen H B, Kooi B J, et al. Metal-ceramic interfaces studied with high-resolution transmission electron microscopy[J]. Acta Mater., 1999, 47: 4077
[20] Vellinga W P, de Hosson J T M. Atomic structure and orientation relations of interfaces between Ag and ZnO[J]. Acta Mater., 1997, 45: 933
[21] Wang J, Misra A.An overview of interface-dominated deformation mechanisms in metallic multilayers[J]. Curr. Opin. Solid State Mater. Sci., 2011, 15: 20
[22] Zheng S J, Wang J, Carpenter J S, et al.Plastic instability mechanisms in bimetallic nanolayered composites[J]. Acta Mater., 2014, 79: 282
[23] Cahn J W,Nabarro F R N. Thermal activation under shear[J]. Philos. Mag., 2001, 81A: 1409
[24] Huang P, Wang F, Xu M, et al.Dependence of strain rate sensitivity upon deformed microstructures in nanocrystalline Cu[J]. Acta Mater., 2010, 58: 5196
[25] Wei Q, Pan Z L, Wu X L, et al.Microstructure and mechanical properties at different length scales and strain rates of nanocrystalline tantalum produced by high-pressure torsion[J]. Acta Mater., 2011, 59: 2423
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