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Quantitative understanding of the effect of grain rotation on the nanovoid growth

  • Xudong Li (a1) and Jianqiu Zhou (a2)

Abstract

A mechanical model is developed to explain the influence of grain rotation on nanovoid growth in nanocrystalline solids in the current paper. In the framework of the mechanical model, the dislocations released from the nanovoid surface will be affected by four stresses: the driving stress induced by far-field stress, the stress arising from grain rotation, the image stress caused by the free surface of the nanovoid, and the back stress generated by the previously emitted dislocations. Furthermore, under the condition of different rotational strength and surface effects, we analyzed in detail the influence of the important parameters such as nanovoid radius, nucleation radius, dislocation emission angle, relative distance, rotation grain size, rotation coefficient, and direction angle on the critical stress. Finally, we discuss the effect of the coupling of rotational deformation and the grain boundary on the growth of the nanovoid. As a conclusion, the high stress nearby the nanovoid can be released by grain rotation, which inhibits the growth of the nanovoid.

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Corresponding author

a)Address all correspondence to this author. e-mail: zhouj@njtech.edu.cn

References

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1.Aifantis, E.C.: Deformation and failure of bulk nanograined and ultrafine-grained materials. Mater. Sci. Eng., A 503, 190 (2009).
2.Lubarda, V.A., Schneider, M.S., Kalantar, D.H., Remington, B.A., and Meyers, M.A.: Void growth by dislocation emission. Acta Mater. 52, 1397 (2004).
3.Meyers, M.A., Mishra, A., and Benson, D.J.: Mechanical properties of nanocrystalline materials. Prog. Mater. Sci. 51, 427 (2006).
4.Wang, L., Zhou, J., Liu, Y., Zhang, S., Wang, Y., and Xing, W.: Nanovoid growth in nanocrystalline metal by dislocation shear loop emission. Mater. Sci. Eng., A 528, 5428 (2011).
5.Zhang, S., Zhou, J., Wang, L., Wang, Y., and Dong, S.: Effect of twin boundaries on nanovoid growth based on dislocation emission. Mater. Sci. Eng., A 582, 29 (2013).
6.Jing, P., Yuan, L., Shivpuri, R., Xu, C., Zhang, Y., Shan, D., and Guo, B.: Evolution of spherical nanovoids within copper polycrystals during plastic straining: Atomistic investigation. Int. J. Plast. 100, 122 (2018).
7.Fang, T.H., Li, W.L., Tao, N.R., and Lu, K.: Revealing extraordinary intrinsic tensile plasticity in gradient nano-grained copper. Science 331, 1587 (2011).
8.Liu, P., Mao, S.C., Wang, L.H., Han, X.D., and Zhang, Z.: Direct dynamic atomic mechanisms of strain-induced grain rotation in nanocrystalline, textured, columnar-structured thin gold films. Scr. Mater. 64, 343 (2011).
9.Li, J. and Chen, S.: Cooperative toughening mechanism of nanocrystalline materials by grain rotation and shear-coupled migration of grain boundaries. Mater. Lett. 121, 174 (2014).
10.Szlufarska, I., Nakano, A., and Vashishta, P.: A crossover in the mechanical response of nanocrystalline ceramics. Science 309, 911 (2005).
11.Rudd, R.E.: Void growth in bcc metals simulated with molecular dynamics using the Finnis–Sinclair potential. Philos. Mag. 89, 3133 (2009).
12.Zhao, K., Gudem Ringdalen, I., Wu, J., He, J., and Zhang, Z.: Ductile mechanisms of metals containing pre-existing nanovoids. Comput. Mater. Sci. 125, 36 (2016).
13.Wang, J.P., Yue, Z.F., Wen, Z.X., Zhang, D.X., and Liu, C.Y.: Orientation effects on the tensile properties of single crystal nickel with nanovoid: Atomistic simulation. Comput. Mater. Sci. 132, 116 (2017).
14.Xu, S., Su, Y., Chen, D., and Li, L.: Plastic deformation of Cu single crystals containing an elliptic cylindrical void. Mater. Lett. 193, 283 (2017).
15.Goyat, V., Verma, S., and Garg, R.K.: Reduction in stress concentration around a pair of circular holes with functionally graded material layer. Acta Mech. 229, 1045 (2017).
16.Stevens, A.L., Davison, L., and Warren, W.E.: Spall fracture in aluminum monocrystals: A dislocation-dynamics approach. J. Appl. Phys. 43, 4922 (1972).
17.Lubarda, V.A.: Emission of dislocations from nanovoids under combined loading. Int. J. Plast. 27, 181 (2011).
18.Ovid’ko, I.A. and Sheinerman, A.G.: Special rotational deformation in nanocrystalline metals and ceramics. Scr. Mater. 59, 119 (2008).
19.Bobylev, S.V., Mukherjee, A.K., and Ovid’ko, I.A.: Transition from plastic shear into rotation deformation mode in nanocrystalline metals and ceramics. Rev. Adv. Mater. Sci. 19, 103 (2009).
20.Morozov, N.F., Ovid’ko, I.A., Sheinerman, A.G., and Aifantis, E.C.: Special rotational deformation as a toughening mechanism in nanocrystalline solids. J. Mech. Phys. Solids 58, 1088 (2010).
21.Li, J., Soh, A.K., and Chen, S.: A coupling crack blunting mechanism in nanocrystalline materials by nano-grain rotation and shear-coupled migration of grain boundaries. Mater. Lett. 137, 218 (2014).
22.Fang, Q.H., Li, B., and Liu, Y.W.: Interaction between edge dislocations and a circular hole with surface stress. Phys. Status Solidi B 244, 2576 (2007).
23.Zhao, Y., Fang, Q., and Liu, Y.: Effect of nanograin boundary sliding on nanovoid growth by dislocation shear loop emission in nanocrystalline materials. Eur. J. Mech. Solid. 49, 419 (2015).
24.Wang, L., Zhou, J., Zhang, S., Liu, Y., and Dong, S.: Effects of accommodated grain boundary sliding on triple junction nanovoid nucleation in nanocrystalline materials. Mech. Mater. 71, 10 (2014).
25.He, T., Zhou, J., and Liu, H.: A quantitative understanding on effects of finest nanograins on nanovoid growth in nanocrystalline materials. J. Nanopart. Res. 17, 380 (2015).
26.Yang, Q. and Gao, C.: Reduction of the stress concentration around an elliptic hole by using a functionally graded layer. Acta Mech. 227, 2427 (2016).
27.Goudarzi, T., Avazmohammadi, R., and Naghdabadi, R.: Surface energy effects on the yield strength of nanoporous materials containing nanoscale cylindrical voids. Mech. Mater. 42, 852 (2010).
28.Zhang, W.X., Wang, T.J., and Chen, X.: Effect of surface/interface stress on the plastic deformation of nanoporous materials and nanocomposites. Int. J. Plast. 26, 957 (2010).
29.Shi, J. and Zikry, M.A.: Grain size, grain boundary sliding, and grain boundary interaction effects on nanocrystalline behavior. Mater. Sci. Eng., A 520, 121 (2009).
30.Li, Q. and Chen, Y.H.: Surface effect and size dependence on the energy release due to a nanosized hole expansion in plane elastic materials. Mech. Mater. 42, 852 (2008).
31.Padmanabhan, K.A. and Gleiter, H.: Optimal structural superplasticity in metals and ceramics of microcrystalline- and nanocrystalline-grain sizes. Mater. Sci. Eng., A 381, 28 (2004).
32.Bobylev, S.V., Gutkin, M.Y., and Ovid’ko, I.A.: Partial and split dislocation configurations in nanocrystalline metals. Phys. Rev. B 73, 064102 (2006).
33.Bobylev, S.V., Mukherjee, A.K., and Ovid’ko, I.A.: Emission of partial dislocations from amorphous intergranular boundaries in deformed nanocrystalline ceramics. Scr. Mater. 60, 36 (2009).
34.Feng, H., Fang, Q.H., Zhang, L.C., and Liu, Y.W.: Special rotational deformation and grain size effect on fracture toughness of nanocrystalline materials. Int. J. Plast. 42, 50 (2013).
35.Fressengeas, C., Taupin, V., and Capolungo, L.: An elasto-plastic theory of dislocation and disclination fields. Int. J. Solids Struct. 48, 3499 (2011).
36.Traiviratana, S., Bringa, E.M., Benson, D.J., and Meyers, M.A.: Void growth in metals: Atomistic calculations. Acta Mater. 56, 3874 (2008).
37.Ovid’ko, I.A. and Sheinerman, A.G.: Grain size effect on crack blunting in nanocrystalline materials. Scr. Mater. 60, 627 (2009).
38.Wang, L., Zhou, J., Zhang, S., Liu, H., and Dong, S.: Effect of dislocation–GB interactions on crack blunting in nanocrystalline materials. Mater. Sci. Eng., A 592, 128 (2014).

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