Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-10T05:43:04.425Z Has data issue: false hasContentIssue false
  • English
  • Français

Atomistic simulation of the strain-hardening behavior of bicrystal Cu nanowires

Published online by Cambridge University Press:  16 December 2013

Lin Yuan ,
Debin Shan ,
Zhenhai Xu ,
Lumeng Wang  and
Bin Guo
Lin Yuan
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Debin Shan*
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Zhenhai Xu
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Lumeng Wang
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Bin Guo
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
*
a)Address all correspondence to this author. e-mail: d.b.shan@gmail.com
Get access

Abstract

To determine whether plastic-hardening behavior occurs in metal nanowires, an atomistic simulation was performed to investigate the tension process in a bicrystal Cu nanowire. The results indicate that bicrystal Cu nanowires exhibit strain-hardening behavior, unlike their single-crystal counterparts. The strain-hardening behavior is related to the orientation of two crystal grains, and the number of atoms determines whether strain-hardening behavior occurs in the asymmetrically tilted bicrystal Cu nanowires. Strain hardening occurs in almost bicrystal Cu nanowires with different orientation angles. The initial yield stress is determined by the grain whose orientation angle is closer to 45° among the two crystal grains, resulting in a high value of the tilting tendency factor, and thus making it easier to generate slip.

Keywords

strain hardeningnanowiresyield stressplasticityatomistic simulation
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 24 , 28 December 2013 , pp. 3339 - 3346
Copyright
Copyright © Materials Research Society 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bulatov, V.V., Hsiung, L.L., Tang, M., Arsenlis, A., Bartelt, M.C., Cai, W., Florando, J.N., Hiratani, M., Rhee, M., Hommes, G., Pierce, T.G., and de la Rubia, T.D.: Dislocation multi-junctions and strain hardening. Nature 440, 1174–1178 (2006).CrossRefGoogle ScholarPubMed
Buehler, M.J., Hartmaier, A., Duchaineau, M.A., Abraham, F.R., and Gao, H.J.: The dynamical complexity of work-hardening: A large-scale molecular dynamics simulation. Acta Mech. Sin. 21, 103–111 (2005).CrossRefGoogle Scholar
Zhu, Y., Qin, Q.Q., Xu, F., Fan, F.R., Ding, Y., Zhang, T., Wiley, B.J., and Wang, Z.L.: Size effects on elasticity, yielding, and fracture of silver nanowires: In situ experiments. Phys. Rev. B 85, 45443 (2012).CrossRefGoogle Scholar
Deng, C. and Sansoz, F.: Enabling ultrahigh plastic flow and work hardening in twinned gold nanowires. Nano Lett. 9, 1517–1522 (2009).CrossRefGoogle ScholarPubMed
Wu, B., Heidelberg, A., and Boland, J.J.: Mechanical properties of ultrahigh-strength gold nanowires. Nat. Mater. 4, 525–529 (2005).CrossRefGoogle ScholarPubMed
Dou, R. and Derby, B.: The strength of gold nanowire forests. Scr. Mater. 59, 151–154 (2008).CrossRefGoogle Scholar
Philippe, L., Wang, Z., Peyrot, I., Hassel, A.W., and Michler, J.: Nanomechanics of rhenium wires: Elastic modulus, yield strength and strain hardening. Acta Mater. 57, 4032–4035 (2009).CrossRefGoogle Scholar
Appell, D.: Nanotechnology: Wired for success. Nature 419, 553–555 (2002).CrossRefGoogle ScholarPubMed
Wang, Z., Zu, X., Yang, L., Gao, F., and Weber, W.J.: Molecular dynamics simulation on the buckling behavior of GaN nanowires under uniaxial compression. Physica E 40, 561–566 (2008).CrossRefGoogle Scholar
Zhu, T. and Gao, H.J.: Plastic deformation mechanism in nanotwinned metals: An insight from molecular dynamics and mechanistic modeling. Scr. Mater. 66, 843–848 (2012).CrossRefGoogle Scholar
Park, H.S. and Zimmerman, J.A.: Stable nanobridge formation in <110> gold nanowires under tensile deformation. Scr. Mater. 54, 1127–1132 (2006).CrossRefGoogle Scholar
Wen, Y.H., Zhang, Y., and Zhu, Z.Z.: Size-dependent effects on equilibrium stress and strain in nickel nanowires. Phys. Rev. B 76, 125423 (2007).CrossRefGoogle Scholar
Weinberger, C.R. and Cai, W.: Plasticity of metal nanowires. J. Mater. Chem. 22, 3277–3292 (2012).CrossRefGoogle Scholar
Deng, C. and Sansoz, F.: Fundamental differences in the plasticity of periodically twinned nanowires in Au, Ag, Al, Cu, Pb and Ni. Acta Mater. 57, 6090–6101 (2009).CrossRefGoogle Scholar
Deng, C. and Sansoz, F.: Effects of twin and surface facet on strain-rate sensitivity of gold nanowires at different temperatures. Phys. Rev. B 81, 155430 (2010).CrossRefGoogle Scholar
Cao, A., Wei, Y.G., and Ma, E.: Grain boundary effects on plastic deformation and fracture mechanisms in Cu nanowires: Molecular dynamics simulations. Phys. Rev. B 77, 195429 (2008).CrossRefGoogle Scholar
Spearot, D.E., Jacob, K.I., and Mcdowell, D.L.: Dislocation nucleation from bicrystal interfaces with dissociated structure. Int. J. Plast. 23, 143–160 (2007).CrossRefGoogle Scholar
Tucker, G.J., Zimmerman, J.A., and Mcdowell, D.L.: Shear deformation kinematics of bicrystalline grain boundaries in atomistic simulations. Modell. Simul. Mater. Sci. Eng. 18, 015002 (2010).CrossRefGoogle Scholar
Daw, M.S. and Baskes, M.I.: Embedded-atom method: Derivation and application to impurities, surfaces, and other defects in metals. Phys. Rev. B 29, 6443–6453 (1984).CrossRefGoogle Scholar
Plimpton, S.J.: Fast parallel algorithms for short-range molecular dynamics. J. Comput. Phys. 117, 1–19 (1995).CrossRefGoogle Scholar
Kelchner, C.L., Plimpton, S.J., and Hamilton, J.C.: Dislocation nucleation and defect structure during surface indentation. Phys. Rev. B 58, 11085–11088 (1998).CrossRefGoogle Scholar