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The effects of grain boundary on the deformation behavior of magnesium bicrystals under tensile loading are investigated using molecular dynamics simulation method. Deformation mechanisms of both asymmetric and symmetric magnesium bicrystals are studied. The results show that the twist angle could exert a significant influence on the flow stress in the plastic stage. It is found that the plastic property of symmetric magnesium bicrystal is much better than that of asymmetric counterpart. In addition, for bicrystalline metal with large twist angle, its plastic response is better than that with small angle, owing to the dislocation nucleation activity in the grain boundary region.
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Keywords:
- molecular dynamics simulation /
- mechanical properties /
- grain boundary
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[26] Li B, Ma E 2009 Phys. Rev. Lett. 103 035503
[27] Liu X Y, Adams J B, Ercolessi F, Moriarty J A 1996 Modell. Simul. Mater. Sci. Eng. 4 293
[28] Melchionna S, Cicotti G, Holian B L 1993 Mol. Phys. 78 533
[29] Melchionna S 2000 Phys. Rev. E 61 6165
[30] Stukowski A 2010 Modell. Simul. Mater. Sci. Eng. 18 015012
[31] Faken D, Jonsson H 1994 Compos. Mater. Sci. 2 279
[32] Milstein F, Rasky D 1982 Philiosophic Magazine A 45 49
[33] Takuya U, Wakabayashi N, Hirabayashi Y, Ohno N 2008 Int. J. Mech. Sci. 50 956
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[1] An M R, Song H Y, Su J F 2012 Chin. Phys. B 21 106202
[2] Ji Q G, Du Y W 2000 Acta Phys. Sin. 49 2281 (in Chinese) [计齐根, 都有为 2000 49 2281]
[3] Xie H X, Liu B, Yin F X, Yu T 2013 Chin. Phys. B 22 010204
[4] He Y G, Lu A X, Wan Q, Zhou Y M 2009 Chin. Phys. B 18 3966
[5] Wang R Z, Xu L C, Yan H, Kohyama M 2012 Acta Phys. Sin. 61 026801 (in Chinese) [王如志, 徐利春, 严辉, 香山正宪 2012 61 026801]
[6] Zhao X C, Liu X M, Gao Y, Zhuang Z 2010 Acta Phys. Sin. 59 6362 (in Chinese) [赵雪川, 刘小明, 高原, 庄茁 2010 59 6362]
[7] Liu X M, You X C, Liu Z L, Nie J F, Zhuang Z 2009 Acta Phys. Sin. 58 1849 (in Chinese) [刘小明, 由小川, 柳占立, 聂君峰, 庄茁 2009 58 1849]
[8] Song H Y, Li Y L 2012 Acta Phys. Sin. 61 226201 (in Chinese) [宋海洋, 李玉龙 2012 61 226201]
[9] Pelaez S, Mochales P G, Serena P A 2012 Comput. Mater. Sci. 58 1
[10] Song H Y, Li Y L 2012 J. Appl. Phys. 112 054322
[11] Song H Y, Li Y L 2012 J. Appl. Phys. 111 044322
[12] Wen Y H, Wang Q, Liew K M, Zhu Z Z 2010 Phys. Lett. A 374 2949
[13] Deng C, Sansoz F 2009 Acs. Nano. 10 3001
[14] Swygenhoven H V 2002 Science 296 66
[15] Lu L, Chen X, Huang X, Lu K 2009 Science 323 607
[16] Kedarnath K, Rauf G M, Dimitrios M 2009 J. Appl. Phys. 105 093515
[17] Schiotz J, Jacobsen K W 2003 Science 301 1357
[18] Zheng Y G, Zhang H W, Chen Z, Lu C, Mai Y W 2009 Phys. Lett. A 373 570
[19] Zheng Y G, Zhang H W, Chen Z, Wang L, Zhang Z Q, Wang J B 2008 Appl. Phys. Lett. 92 041913
[20] Wu Z X, Zhang Y Z, Srolovitz D J 2011 Acta Mater. 59 6890
[21] Cao A J, Wei Y G 2007 J. Appl. Phys. 102 083511
[22] Song H Y, Li Y L 2012 Phys. Lett. A 376 529
[23] Li B, Ma E 2009 Acta Mater. 57 1734
[24] Kim D H, Manuel M V, Ebrahimi F, Tulenko J S, Phillpot S P 2010 Acta Mater. 58 6217
[25] Kim D H, Ebrahimi F, Manuel M V, Tulenko J S, Phillpot S 2011 Mater. Sci. Eng. A 528 5411
[26] Li B, Ma E 2009 Phys. Rev. Lett. 103 035503
[27] Liu X Y, Adams J B, Ercolessi F, Moriarty J A 1996 Modell. Simul. Mater. Sci. Eng. 4 293
[28] Melchionna S, Cicotti G, Holian B L 1993 Mol. Phys. 78 533
[29] Melchionna S 2000 Phys. Rev. E 61 6165
[30] Stukowski A 2010 Modell. Simul. Mater. Sci. Eng. 18 015012
[31] Faken D, Jonsson H 1994 Compos. Mater. Sci. 2 279
[32] Milstein F, Rasky D 1982 Philiosophic Magazine A 45 49
[33] Takuya U, Wakabayashi N, Hirabayashi Y, Ohno N 2008 Int. J. Mech. Sci. 50 956
[34] Qi H G, Guo Y F 2008 Chin. J. Comput. Mech. 25 72 (in Chinese) [亓宏刚, 郭雅芳 2008 计算力学学报 25 72]
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