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The propagation process of crack in the nanocrystalline Ni is simulated via the quasicontinuum method. The results show that the stress near the crack tip could prompt the disassociation of grain boundaries, and the formation of stacking faults and deformation twins. Farther from the crack tip, fewer deformation twins can be found. There are more stacking faults than deformation twins in the grains, which approximately have the same distance to the crack tip. The effect on deformation twins from the variation of local stress and generalized planar fault energies is manifested by these results. The distribution of hydrostatic stress on atomic-level around the crack tip is also calculated. It is shown that nanovoids can be easily created in grain boundaries in front of the crack tip. There exists an intense tensile stress state in the grain boundary regions around these nanovoids. As a result of the stress accumulation, the crack propagates along the grain boundaries. Our simulated results qualitatively uncover the propagation process of crack in nanocrystalline Ni, which agrees well with the relevant experimental results.
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Keywords:
- multiscale simulation /
- nanomaterials /
- crack /
- deformation twin
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[18] Zhou T, Yang X H, Chen C Y 2009 Int. J. Solids Struct. 46 1975
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[20] Swygenhoven H V, Derlet P M, Froseth A G 2004 Nature Mater. 3 399
[21] Wu X L, Zhu Y T 2008 Phys. Rev. Lett. 101 025503
[22] Farkas D, Petegem S V, Derlet P M, Swygenhoven H V 2005 Acta Mater. 53 3115
[23] Tadmor E B, Ortiz M, Phillips R 1996 Philos. Mag. A 73 1529
[24] Tadmor E B, Phillips R, Ortiz M 1996 Langmuir 12 4529
[25] Miller R E, Tadmor E B 2002 J. Computer-Aided Mater. Design 9 203
[26] Voronoi G Z 1908 J. Reine Angew. Math. 134 199
[27] Hai S, Tadmor E B 2003 Acta Mater. 51 117
[28] Sih G C, Liebowitz H 1968 Fracture: An Advanced Treatise (Vol. 2) (New York: Academic Press) p67
[29] Meyers M A, Chawla K K 2009 Mechanical Behavior of Materials (2nd Ed) (New York: Cambridge University Press) p114
[30] Mishin Y, Farkas D, Mehl M J, Papaconstantopoulos D A 1999 Phys. Rev. B 59 3393
[31] Li J 2003 Modeling Simul. Mater. Sci. Engng. 11 173
[32] Honeycutt J D, Andersen H C 1987 J. Phys. Chem. 91 4950
[33] Cormier J, Rickman J M, Delph T J 2001 J. Appl. Phys. 89 99
[34] Saramas M, Derlet P M, Swygenhoven H V 2003 Phys. Rev. B 68 224111
[35] Zimmerman J A, Gao H J, Abraham F F 2000 Modeling Simul. Mater. Sci. Engng. 8 103
[36] Siegel D J 2005 Appl. Phys. Lett. 87 121901
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[1] Meyers M A, Mishra A, Benson D J 2006 Prog. Mater. Sci. 51 427
[2] Dao M, Lu L, Asaro R J, Hosson J T M, Ma E 2007 Acta Mater. 55 4041
[3] Zhao Y H, Topping T, Bingert J F, Thornton J J, Dangelewicz A M, Li Y, Liu W, Zhu Y T, Zhou Y Z, Lavernia E J 2008 Adv. Mater. 20 3028
[4] Kumar K S, Suresh S, Chisholm M F, Horton J A, Wang P 2003 Acta Mater. 51 387
[5] Shan Z W, Knapp J A, Follstaedt D M, Stach E A, Wiezorek J M K, Mao S X 2008 Phys. Rev. Lett. 100 105502
[6] Xie J J, Wu X L, Hong Y S 2007 Scripta Mater. 57 5
[7] Farkas D, Swygenhoven H V, Derlet P M 2002 Phys. Rev. B 66 060101
[8] Cao A J, Wei Y G 2007 Phys. Rev. B 76 024113
[9] Farkas D, Willemann M, Hyde B 2005 Phys. Rev. Lett. 94 165502
[10] Zhou H F, Qu S X 2010 Nanotechnology 21 035706
[11] Cao L X, Wang C Y 2007 Acta Phys. Sin. 56 413 (in Chinese) [曹莉霞、王崇愚 2007 56 413]
[12] Xie H X, Wang C Y, Yu T, Du J P 2009 Chin. Phys. B 18 251
[13] Abraham F F, Walkup R, Gao H J, Duchaineau M, Rubia T, Seager M 2002 Proc. Natl. Acad. Sci. USA 99 5783
[14] Tadmor E B, Hai S 2003 J. Mech. Phys. Solids 51 765
[15] Wang H T, Qin Z D, Ni Y S, Zhang W 2009 Acta Phys. Sin. 58 1057 (in Chinese) [王华滔、秦昭栋、倪玉山、张 文 2009 58 1057]
[16] Shimokawa T, Kinari T, Shintaku S 2007 Phys. Rev. B 75 144108
[17] Miller R E, Ortiz M, Phillips R, Shenoy V, Tadmor E B 1998 Eng. Fracture Mech. 61 427
[18] Zhou T, Yang X H, Chen C Y 2009 Int. J. Solids Struct. 46 1975
[19] Swygenhoven H V, Farkas D, Caro A 2000 Phys. Rev. B 62 831
[20] Swygenhoven H V, Derlet P M, Froseth A G 2004 Nature Mater. 3 399
[21] Wu X L, Zhu Y T 2008 Phys. Rev. Lett. 101 025503
[22] Farkas D, Petegem S V, Derlet P M, Swygenhoven H V 2005 Acta Mater. 53 3115
[23] Tadmor E B, Ortiz M, Phillips R 1996 Philos. Mag. A 73 1529
[24] Tadmor E B, Phillips R, Ortiz M 1996 Langmuir 12 4529
[25] Miller R E, Tadmor E B 2002 J. Computer-Aided Mater. Design 9 203
[26] Voronoi G Z 1908 J. Reine Angew. Math. 134 199
[27] Hai S, Tadmor E B 2003 Acta Mater. 51 117
[28] Sih G C, Liebowitz H 1968 Fracture: An Advanced Treatise (Vol. 2) (New York: Academic Press) p67
[29] Meyers M A, Chawla K K 2009 Mechanical Behavior of Materials (2nd Ed) (New York: Cambridge University Press) p114
[30] Mishin Y, Farkas D, Mehl M J, Papaconstantopoulos D A 1999 Phys. Rev. B 59 3393
[31] Li J 2003 Modeling Simul. Mater. Sci. Engng. 11 173
[32] Honeycutt J D, Andersen H C 1987 J. Phys. Chem. 91 4950
[33] Cormier J, Rickman J M, Delph T J 2001 J. Appl. Phys. 89 99
[34] Saramas M, Derlet P M, Swygenhoven H V 2003 Phys. Rev. B 68 224111
[35] Zimmerman J A, Gao H J, Abraham F F 2000 Modeling Simul. Mater. Sci. Engng. 8 103
[36] Siegel D J 2005 Appl. Phys. Lett. 87 121901
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