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Dynamic strain aging, i.e. the interaction between dislocations and solute atoms, affects the mechanical properties of alloys. In this paper, a 2D-kinetic Monte Carlo model relating to the interaction between dislocations and solute atoms is developed to simulate the motions of edge dislocations in four different conditions. In “single dislocation with constant stress rate” condition, single dislocation is pinned under low stress rate, moves continuously under high stress rate, and moves intermittently under middle stress rates. In “multi-dislocation with zero stress” condition, the solute atoms gather below positive dislocations and above negative dislocations. In “multi-dislocation with constant stress” condition, the influence of solute atoms on dislocation motion becomes stronger with stress decreasing. In “multi-dislocation with constant stress rate” condition, the collective pinning and unpinning result in the stepped curve of total displacement. The simulated results present the process of dynamic strain aging in a microscopic scale and are consistent with theoretical results.
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Keywords:
- dynamic strain aging /
- kinetic model /
- dislocation motion
[1] Jiang H F, Zhang Q C, Xu Y H, Wu X P 2006 Acta Phys. Sin. 55 409 (in Chinese) [江慧丰, 张青川, 徐毅豪, 伍小平 2006 55 409]
[2] Peng K P, Chen W Z, Qian K W 2006 Acta Phys. Sin. 55 3569 (in Chinese) [彭开萍, 陈文哲, 钱匡武 2006 55 3569]
[3] Yuan F P, Jiang P, Wu X L 2011 Theor. Appl. Mech. Lett. 1 021002
[4] Cui C Y, Gu Y F, Yuan Y, Harada H 2011 Scripta Mater. 64 502
[5] Deschamps A, Decreus B, De Geuser F, Dorin T, Weyland M 2013 Acta Mater. 61 4010
[6] Mulford R A, Kocks U F 1979 Acta Metall. 27 1125
[7] McCormick P G 1988 Acta Metall. 36 3061
[8] Picu R C 2004 Acta Mater. 52 3447
[9] Curtin W A, Olmsted D L, Hector L G 2006 Nat. Mater. 5 875
[10] Hrutkay K, Kaoumi D 2014 Mater. Sci. Eng. A 599 196
[11] Sun L, Zhang Q C, Cao P T 2009 Chin. Phys. B 18 3500
[12] Cao P T, Zhang Q C, Xiao R, Xiong S M 2009 Acta Phys. Sin. 58 5591 (in Chinese) [曹鹏涛, 张青川, 肖锐, 熊少敏 2009 58 5591]
[13] Gao Y, Fu S H, Cai Y L, Cheng T, Zhang Q C 2014 Acta Phys. Sin. 63 066201 (in Chinese) [高越, 符师桦, 蔡玉龙, 程腾, 张青川 2014 63 066201]
[14] Han G M, Cui C Y, Gu Y F, Hu Z Q, Sun X F 2013 Acta Metall. Sin. 49 1243 (in Chinese) [韩国明, 崔传勇, 谷月峰, 胡壮麒, 孙晓峰 2013 金属学报 49 1243]
[15] Fu S H, Cheng T, Zhang Q C, Hu Q, Cao P T 2012 Acta Mater. 60 6650
[16] Hu Q, Zhang Q C, Fu S H, Cao P T, Gong M 2011 Theor. Appl. Mech. Lett. 1 011007
[17] Ananthakrishna G, Sahoo D 1982 J. Phys. D: Appl. Phys. 14 2081
[18] Kubin L P, Spiesser P, Estrin Y 1982 Acta Metall. 33 397
[19] Hahner P, Rizzi E 2003 Acta Mater. 51 3385
[20] Jiang H F, Zhang Q C, Chen X D, Chen Z J, Jiang Z Y, Wu X P, Fan J H 2007 Acta Mater. 55 2219
[21] Hu Q, Zhang Q C, Cao P T, Fu S H 2012 Acta Mater. 60 1647
[22] Zhu L L, Chen A Y, Lu J 2012 Theor. Appl. Mech. Lett. 2 021001
[23] Lebyodkin M, Dunin-Barkovskii L, Bréchet Y, Estrin Y, Kubin L P 2000 Acta Mater. 48 2529
[24] Wang Y, Srolovitz D J, Richman J M 2000 Acta Mater. 48 2163
[25] Kubin L P, Estrin Y 1990 Acta Metall. 38 697
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[1] Jiang H F, Zhang Q C, Xu Y H, Wu X P 2006 Acta Phys. Sin. 55 409 (in Chinese) [江慧丰, 张青川, 徐毅豪, 伍小平 2006 55 409]
[2] Peng K P, Chen W Z, Qian K W 2006 Acta Phys. Sin. 55 3569 (in Chinese) [彭开萍, 陈文哲, 钱匡武 2006 55 3569]
[3] Yuan F P, Jiang P, Wu X L 2011 Theor. Appl. Mech. Lett. 1 021002
[4] Cui C Y, Gu Y F, Yuan Y, Harada H 2011 Scripta Mater. 64 502
[5] Deschamps A, Decreus B, De Geuser F, Dorin T, Weyland M 2013 Acta Mater. 61 4010
[6] Mulford R A, Kocks U F 1979 Acta Metall. 27 1125
[7] McCormick P G 1988 Acta Metall. 36 3061
[8] Picu R C 2004 Acta Mater. 52 3447
[9] Curtin W A, Olmsted D L, Hector L G 2006 Nat. Mater. 5 875
[10] Hrutkay K, Kaoumi D 2014 Mater. Sci. Eng. A 599 196
[11] Sun L, Zhang Q C, Cao P T 2009 Chin. Phys. B 18 3500
[12] Cao P T, Zhang Q C, Xiao R, Xiong S M 2009 Acta Phys. Sin. 58 5591 (in Chinese) [曹鹏涛, 张青川, 肖锐, 熊少敏 2009 58 5591]
[13] Gao Y, Fu S H, Cai Y L, Cheng T, Zhang Q C 2014 Acta Phys. Sin. 63 066201 (in Chinese) [高越, 符师桦, 蔡玉龙, 程腾, 张青川 2014 63 066201]
[14] Han G M, Cui C Y, Gu Y F, Hu Z Q, Sun X F 2013 Acta Metall. Sin. 49 1243 (in Chinese) [韩国明, 崔传勇, 谷月峰, 胡壮麒, 孙晓峰 2013 金属学报 49 1243]
[15] Fu S H, Cheng T, Zhang Q C, Hu Q, Cao P T 2012 Acta Mater. 60 6650
[16] Hu Q, Zhang Q C, Fu S H, Cao P T, Gong M 2011 Theor. Appl. Mech. Lett. 1 011007
[17] Ananthakrishna G, Sahoo D 1982 J. Phys. D: Appl. Phys. 14 2081
[18] Kubin L P, Spiesser P, Estrin Y 1982 Acta Metall. 33 397
[19] Hahner P, Rizzi E 2003 Acta Mater. 51 3385
[20] Jiang H F, Zhang Q C, Chen X D, Chen Z J, Jiang Z Y, Wu X P, Fan J H 2007 Acta Mater. 55 2219
[21] Hu Q, Zhang Q C, Cao P T, Fu S H 2012 Acta Mater. 60 1647
[22] Zhu L L, Chen A Y, Lu J 2012 Theor. Appl. Mech. Lett. 2 021001
[23] Lebyodkin M, Dunin-Barkovskii L, Bréchet Y, Estrin Y, Kubin L P 2000 Acta Mater. 48 2529
[24] Wang Y, Srolovitz D J, Richman J M 2000 Acta Mater. 48 2163
[25] Kubin L P, Estrin Y 1990 Acta Metall. 38 697
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