-
Dislocation climb plays a vital role in the plastic behavior of crystals at high temperatures. In order to reveal the intrinsic mechanism of climb and its effect on plasticity, a new dislocation climb model is first developed based on the combination of the diffusion theory with both bulk diffusion and pipe diffusion in a three-dimensional discrete dislocation dynamics (DDD) simulation, which is considered to be more physical and widely applicable. Using our model the shrinkage processes of a single prismatic loop group and prismatic loop group are simulated. It is concluded that the climb rate is not directly determined by mechanical climb force as believed in classical theories, but by the gradient of the vacancy concentration around (bulk diffusion) and along (pipe diffusion) the dislocation line. Loop coarsening process is also simulated, and the three pronounced evolving stages of the loop radii and the average vacancy concentrations in crystal are reproduced.
-
Keywords:
- dislocation climb /
- diffusion theory of point defects /
- dislocation dynamics /
- prismatic dislocation loop
[1] Hirth J P, Lothe J 1982 Theory of Dislocations (New York: Wiley Interscience)
[2] Li Y, Kong Q P 1989 Acta Phys. Sin. 38 91 (in Chinese) [李勇、孔庆平 1989 物理学报 38 91]
[3] Allnatt A, Lidiard A 1993 Atomic transport in solids (Cambridge: Cambridge University Press)
[4] Caillard D, Martin J 2003 Thermally activated mechanisms in crystal plasticity (Amsterdam: Pergamon Press)
[5] Fedelich B 2002 Int. J. Plast. 18 1
[6] Hiratani M, Zbib H 2002 J. Eng. Mater. Technol. 124 335
[7] Li H, Lin J, Dean T A, Wen S W, Bannister A C 2009 Int. J. Plast. 25 1049
[8] Mordehai D, Clouet E, Fivel M, Verdier M 2008 Philos. Mag. 88 899
[9] Amodeo R, Ghoniem N 1990 Phys. Rev. B 41 6958
[10] Roters F, Raabe D, Gottstein G 1996 Comput. Mater. Sci. 7 56
[11] Argaman N, Levy O, Makov G 2001 Mater. Sci. Eng. A 309 386
[12] Bakó B, Groma I, Györgyi G, Zimányi G 2006 Comput. Mater. Sci. 38 22
[13] Ghoniem N, Tong S, Sun L 2000 Phys. Rev. B 61 913
[14] Cleveringa H H M, Van der Giessen E, Needleman A 1999 Int. J. Plast. 15 837
[15] Tang X, Lagerl f K, Heuer A 2003 J. Am. Ceram. Soc. 86 560
[16] Legros M, Dehm G, Arzt E, Balk T 2008 Science 319 1646
[17] Ge T S 1996 Acta Phys. Sin. 45 1016 (in Chinese) [葛庭燧 1996 物理学报 45 1016]
[18] Edelin G 1971 Philos. Mag. 23 1547
[19] Liu Z L, Liu X M, Zhuang Z, You X C 2009 Scripta Mater. 60 594
[20] Liu Z L, Liu X M, Zhuang Z, You X C 2009 Int. J. Plast. 25 1436
[21] Lu G, Fang B Q, Zhang G C, Xu A G 2009 Acta Phys. Sin. 58 7934 (in Chinese) [卢 果、方步青、张广财、许爱国 2009 物理学报 58 7934]
[22] Silcox J, Whelan M 1960 Philos. Mag. 5 1
[23] Sun H, Pan X, Haeni J, Schlom D 2004 Appl. Phys. Lett. 85 1967
[24] Burton B, Speight M 1986 Philos. Mag. A 53 385
-
[1] Hirth J P, Lothe J 1982 Theory of Dislocations (New York: Wiley Interscience)
[2] Li Y, Kong Q P 1989 Acta Phys. Sin. 38 91 (in Chinese) [李勇、孔庆平 1989 物理学报 38 91]
[3] Allnatt A, Lidiard A 1993 Atomic transport in solids (Cambridge: Cambridge University Press)
[4] Caillard D, Martin J 2003 Thermally activated mechanisms in crystal plasticity (Amsterdam: Pergamon Press)
[5] Fedelich B 2002 Int. J. Plast. 18 1
[6] Hiratani M, Zbib H 2002 J. Eng. Mater. Technol. 124 335
[7] Li H, Lin J, Dean T A, Wen S W, Bannister A C 2009 Int. J. Plast. 25 1049
[8] Mordehai D, Clouet E, Fivel M, Verdier M 2008 Philos. Mag. 88 899
[9] Amodeo R, Ghoniem N 1990 Phys. Rev. B 41 6958
[10] Roters F, Raabe D, Gottstein G 1996 Comput. Mater. Sci. 7 56
[11] Argaman N, Levy O, Makov G 2001 Mater. Sci. Eng. A 309 386
[12] Bakó B, Groma I, Györgyi G, Zimányi G 2006 Comput. Mater. Sci. 38 22
[13] Ghoniem N, Tong S, Sun L 2000 Phys. Rev. B 61 913
[14] Cleveringa H H M, Van der Giessen E, Needleman A 1999 Int. J. Plast. 15 837
[15] Tang X, Lagerl f K, Heuer A 2003 J. Am. Ceram. Soc. 86 560
[16] Legros M, Dehm G, Arzt E, Balk T 2008 Science 319 1646
[17] Ge T S 1996 Acta Phys. Sin. 45 1016 (in Chinese) [葛庭燧 1996 物理学报 45 1016]
[18] Edelin G 1971 Philos. Mag. 23 1547
[19] Liu Z L, Liu X M, Zhuang Z, You X C 2009 Scripta Mater. 60 594
[20] Liu Z L, Liu X M, Zhuang Z, You X C 2009 Int. J. Plast. 25 1436
[21] Lu G, Fang B Q, Zhang G C, Xu A G 2009 Acta Phys. Sin. 58 7934 (in Chinese) [卢 果、方步青、张广财、许爱国 2009 物理学报 58 7934]
[22] Silcox J, Whelan M 1960 Philos. Mag. 5 1
[23] Sun H, Pan X, Haeni J, Schlom D 2004 Appl. Phys. Lett. 85 1967
[24] Burton B, Speight M 1986 Philos. Mag. A 53 385
-
[1] 秦梦飞, 王英敏, 张红玉, 孙继忠. 〈100〉 间隙型位错环在纯钨及含氦杂质钨(010)表面下运动行为的分子动力学模拟. 物理学报, 2023, 72(24): 245204. doi: 10.7498/aps.72.20230651[2] 李然然, 张一帆, 殷玉鹏, 渡边英雄, 韩文妥, 易晓鸥, 刘平平, 张高伟, 詹倩, 万发荣. 注氢纯铝中间隙型位错环一维迁移现象的原位观察. 物理学报, 2022, 71(1): 016102. doi: 10.7498/aps.71.20211229 [3] 张博佳, 安敏荣, 胡腾, 韩腊. 镁中位错和非晶作用机制的分子动力学模拟. 物理学报, 2022, 71(14): 143101. doi: 10.7498/aps.71.20212318 [4] 梁晋洁, 高宁, 李玉红. 体心立方Fe中 ${ \langle 100 \rangle}$ 位错环对微裂纹扩展影响的分子动力学研究. 物理学报, 2020, 69(11): 116102. doi: 10.7498/aps.69.20200317[5] 崔丽娟, 高进, 杜玉峰, 张高伟, 张磊, 龙毅, 杨善武, 詹倩, 万发荣. 氢离子辐照纯钒中形成的位错环. 物理学报, 2016, 65(6): 066102. doi: 10.7498/aps.65.066102 [6] 李桂荣, 王宏明, 李沛思, 高雷章, 彭琮翔, 郑瑞. 磁致塑性效应下的位错动力学机制. 物理学报, 2015, 64(14): 148102. doi: 10.7498/aps.64.148102 [7] 罗诗裕, 李洪涛, 吴木营, 王善进, 凌东雄, 张伟风, 邵明珠. 应变超晶格系统的共振行为及其动力学稳定性. 物理学报, 2010, 59(8): 5766-5771. doi: 10.7498/aps.59.5766 [8] 周耐根, 周 浪. 外延生长薄膜中失配位错形成条件的分子动力学模拟研究. 物理学报, 2005, 54(7): 3278-3283. doi: 10.7498/aps.54.3278 [9] 罗诗裕, 邵明珠, 韦洛霞, 刘曾荣. 位错动力学与系统的全局分叉. 物理学报, 2004, 53(6): 1940-1945. doi: 10.7498/aps.53.1940 [10] 谭启. 从铝合金的应变时效内耗考察位错与点缺陷的交互作用. 物理学报, 1994, 43(10): 1658-1664. doi: 10.7498/aps.43.1658 [11] 方前锋, 葛庭燧. 与位错和点缺陷的交互作用有关的低温内耗峰. 物理学报, 1993, 42(3): 458-464. doi: 10.7498/aps.42.458 [12] 高飞. 晶体缺陷规范场中的刃位错. 物理学报, 1990, 39(10): 1591-1598. doi: 10.7498/aps.39.1591 [13] 李勇, 孔庆平. 扩展位错攀移的高温蠕变机制. 物理学报, 1989, 38(1): 91-97. doi: 10.7498/aps.38.91 [14] 高飞, 张宏图. 位错规范场对于位错芯区的应用. 物理学报, 1989, 38(7): 1127-1133. doi: 10.7498/aps.38.1127 [15] 龙期威, 熊良钺. 裂纹顶端的异号位错和无位错区的象力理论. 物理学报, 1984, 33(6): 755-761. doi: 10.7498/aps.33.755 [16] 郭常霖. α—SiC晶体中的位错. 物理学报, 1982, 31(11): 1511-1525. doi: 10.7498/aps.31.1511 [17] 郭可信, 林保军. 镍铬合金中的位错运动与位错反应. 物理学报, 1978, 27(6): 729-745. doi: 10.7498/aps.27.729 [18] 葛庭燧, 张进修. 金属范性形变低频内耗的位错动力学模型. 物理学报, 1975, 24(2): 87-90. doi: 10.7498/aps.24.87 [19] 邢修三. 空位位错环的形成. 物理学报, 1966, 22(5): 541-546. doi: 10.7498/aps.22.541 [20] 杨顺华. 位错环与点阵空位间的弹性相互作用. 物理学报, 1964, 20(8): 720-727. doi: 10.7498/aps.20.720
计量
- 文章访问数: 11459
- PDF下载量: 838
- 被引次数: 0
下载:
