Molecular dynamics simulation of mechanism of interaction between dislocation and amorphism in magnesium

Zhang Bo-Jia; An Min-Rong; Hu Teng; Han La

doi:10.7498/aps.71.20212318

Abstract

As the lightest metal structural material, magnesium alloy is known as the “green engineering material” of the 21st century. Especially, crystalline-amorphous dual-phase nanostructure magnesium materials exhibit excellent mechanical properties, though the mechanism of interaction between the dislocation in crystal and amorphous phase is still under the investigation. In the present work, the interaction between the edge dislocation and amorphous phase in nanocrystalline magnesium under shear load is studied by using molecular dynamics simulation. The result indicates that the interaction mechanism between amorphous phase and dislocation shows the size dependence. Compared with the sample with smaller amorphous size, larger amorphous size will lead to a large second strengthening effect. And the mechanism of the interaction between amorphous phase and dislocation is mainly attributed to the pinning effect of amorphous on the dislocation. For the samples with small amorphous size, the pinning effect of amorphous on the dislocation is limited and the pinning time is shorter. The interaction mechanism is contributed mainly by the dislocation bypassing amorphous phase. While for the samples with larger amorphous size, the pinning effect of amorphous on the dislocation is larger and the pinning time is longer. The interaction is due mainly to the cross slip mechanism of dislocation caused by amorphous phase. The results from this work have a certain reference value and guiding significance for designing and preparing the high-performance magnesium and its alloys.

Keywords:

crystalline-amorphous dual-phase nanostructure magnesium /
dislocation /
deformation mechanism /
molecular dynamics simulation

Authors and contacts

College of Materials Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China

Corresponding author: An Min-Rong, anminrong@xsyu.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11572259), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2021JZ-53), and the Program for Graduate Innovation Fund of Xi’an Shiyou University, China (Grant No. YCS20211049).

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References

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[36]	Jian W R, Zhang M, Xu S, Beyerlein I J 2020 Model. Simul. Mater. Sci. Eng. 28 045004 Google Scholar

Cited By

图 1 剪切变形过程中位错与非晶柱体相互作用示意图

Figure 1. Schematic of interaction between dislocation and amorphous nanopillar under shear deformation.

DownLoad: Full-Size Img PowerPoint

图 2 含有不同非晶相尺寸和不含非晶相的纳米晶镁的剪切应力-应变曲线

Figure 2. Shear stress-strain curves of the nanocrystalline Mg with different amorphous nanopillar sizes and without amorphous nanopillar.

DownLoad: Full-Size Img PowerPoint

图 3 不含非晶相的样品在不同剪切应变下的变化过程　(a)—(f)不同剪切应变时YZ面视图; (a₁)—(f₁)不同剪切应变时XY面视图

Figure 3. The evolution process of the sample without amorphous nanopillar at different shear strains: (a)–(f) View of YZ plane; (a₁)–(f₁) view of XY plane.

DownLoad: Full-Size Img PowerPoint

图 4 非晶相尺寸为1.6 nm的样品在不同剪切应变下的变化过程　(a)—(f)不同剪切应变时YZ面视图; (a₁)—(f₁)不同剪切应变时XY面视图

Figure 4. The evolution process of the sample with amorphous nanopillar size of 1.6 nm at different shear strains: (a)–(f) View of YZ plane; (a₁)–(f₁) view of XY plane.

DownLoad: Full-Size Img PowerPoint

图 5 非晶相尺寸为4.0 nm的样品在不同剪切应变下的变化过程　(a)—(f)不同剪切应变时YZ面视图; (a₁)—(f₁)不同剪切应变时XY面视图

Figure 5. The evolution process of the sample with amorphous nanopillar size of 4 nm at different shear strains: (a)–(f) View of YZ plane; (a₁)–(f₁) view of XY plane.

DownLoad: Full-Size Img PowerPoint

图 6 图5(f₁)中类螺位错的细节图　(a)图5(f₁)中类螺位错的具体形貌图, d代表层错宽度; (b) DXA分析出的位错结构图; (c)扩展位错交滑移的细节图

Figure 6. The details of the like-screw dislocation shown in Fig. 5(f₁): (a) The specific morphologies of like-screw dislocation; (b) dislocation structure analyzed by DXA method; (c) the cross-slip details of the extended dislocation.

DownLoad: Full-Size Img PowerPoint

图 7 不同非晶相尺寸的样品中, 非晶相对位错的钉扎时间

Figure 7. The variation of pinning time versus amorphous nanopillar size.

DownLoad: Full-Size Img PowerPoint

图 8 位错与非晶相的作用机制　(a)非晶相尺寸较小时的位错绕过机制; (b)非晶相尺寸较大时的扩展位错交滑移机制

Figure 8. The interaction mechanism of the dislocation and the amorphous phase: (a) The dislocation bypass mechanism for the sample with small amorphous nanopillar size; (b) the cross-slip mechanism of extended dislocation for the sample with larger amorphous nanopillar size.

DownLoad: Full-Size Img PowerPoint

图 9 非晶相尺寸为3.0 nm的样品与位错的相互作用的过程　(a)—(f)不同剪切应变时XY面视图; (a₁)—(f₁)不同剪切应变时YZ面视图

Figure 9. The evolution process of the sample with amorphous nanopillar size of 3.0 nm at different shear strains: (a)–(f) View of XY plane; (a₁)–(f₁) view of YZ plane.

DownLoad: Full-Size Img PowerPoint

图 10 非晶相尺寸为3.3 nm的样品与位错的相互作用　(a)—(f)不同剪切应变时XY面视图; (a₁)—(f₁)不同剪切应变时YZ面视图

Figure 10. The evolution process of the sample with amorphous nanopillar size of 3.3 nm at different shear strains: (a)–(f) View of XY plane; (a₁)–(f₁) view of YZ plane.

DownLoad: Full-Size Img PowerPoint

图 11 非晶相尺寸为3.6 nm的样品与位错的相互作用的过程　(a)—(f)不同剪切应变时XY面视图; (a₁)—(f₁)不同剪切应变时YZ面视图

Figure 11. The evolution process of the sample with amorphous nanopillar size of 3.6 nm at different shear strains: (a)–(f) View of XY plane; (a₁)–(f₁) view of YZ plane.

DownLoad: Full-Size Img PowerPoint

map

[1]	Pollock T M 2010 Science 328 986 Google Scholar
[2]	Wu Z, Ahmad R, Yin B, Sandlöbes S, Curtin W A 2018 Science 359 447
[3]	Liu B Y, Liu F, Yang N, Zhai X B, Zhang L, Yang Y, Li B, Li J, Ma E, Nie J F, Shan Z W 2019 Science 365 73 Google Scholar
[4]	Wu G, Chan K C, Zhu L, Sun L, Lu J 2017 Nature 545 80 Google Scholar
[5]	Dai J L, Song H Y, An M R, Wang J Y, Deng Q, Li Y L 2020 J. Appl. Phys. 127 135105 Google Scholar
[6]	Wang J Y, Song H Y, An M R, Deng Q, Li Y L 2020 Chin. Phys. B 29 066201 Google Scholar
[7]	Song H Y, Zuo X D, Yin P, An M R, Li Y L 2018 J. Non-Cryst. Solids 494 1 Google Scholar
[8]	Song H Y, Li Y L 2015 Phys. Lett. A 379 2087 Google Scholar
[9]	Song H Y, Zuo X D, An M R, Xiao M X, Li Y L 2019 Comput. Mater. Sci. 160 295 Google Scholar
[10]	Ardell A J 1985 Metall. Trans. A 16 2131 Google Scholar
[11]	Nie J F 2012 Metall. Mater. Trans. A 43 3891 Google Scholar
[12]	Gao S, Fivel M, Ma A, Hartmaier A 2015 J. Mech. Phys. Solids 76 276 Google Scholar
[13]	Santos-Güemes R, Esteban-Manzanares G, Papadimitriou I, Segurado J, Capolungo L, LLorca J 2018 J. Mech. Phys. Solids 118 228 Google Scholar
[14]	Li J, Liu B, Fang Q H, Huang Z, Liu Y 2017 Ceram. Int. 43 3839 Google Scholar
[15]	Bryukhanov I A 2020 Int. J. Plast. 135 102834 Google Scholar
[16]	Cepeda-Jimenez C M, Castillo-Rodríguez M, Perez-Prado M T 2019 Acta Mater. 165 164 Google Scholar
[17]	Alizadeh R, LLorca R 2020 Acta Mater. 186 475 Google Scholar
[18]	Huang Z, Yang C, Qi L, Allison J E, Misra A 2019 Mater. Sci. Eng. A 742 278 Google Scholar
[19]	Esteban-Manzanares G, Alizadeh R, Papadimitriou I, Dickel D, Barrett C D, Lorca J L 2020 Mater. Sci. Eng. A 788 139555 Google Scholar
[20]	Ye T, Xu Y, Ren J 2019 Mater. Sci. Eng. A 753 146 Google Scholar
[21]	Habiyaremye F, Guitton A, Schäfer F, Scholz F, Schneider M, Frenzel J, Laplanche G, Maloufi N 2021 Mater. Sci. Eng. A 817 141364 Google Scholar
[22]	Li H, Gao S, Tomota Y, Li S, Tsuji N, Ohmura T 2021 Acta Mater. 206 116621 Google Scholar
[23]	Li Y, Ran G, Guo Y, Sun Z, Liu X, Li Y, Qiu X, Xin Y 2021 Acta Mater. 201 462
[24]	杨权, 马立, 耿松超, 林旖旎, 陈涛, 孙立宁 2021 70 106101 Google Scholar Yang Q, Ma L, Geng S C, Lin Y N, Chen T, Sun L N 2021 Acta Phys. Sin. 70 106101 Google Scholar
[25]	潘伶, 张昊, 林国斌 2021 70 134704 Google Scholar Pan L, Zhang H, Lin G B 2021 Acta Phys. Sin. 70 134704 Google Scholar
[26]	申天展, 宋海洋, 安敏荣 2021 70 186201 Google Scholar Shen T Z, Song H Y, An M R 2021 Acta Phys. Sin. 70 186201 Google Scholar
[27]	刘东静, 王韶铭, 杨平 2021 70 187302 Google Scholar Liu D J, Wang S M, Yang P 2021 Acta Phys. Sin. 70 187302 Google Scholar
[28]	Su M J, Deng Q, An M R, Liu L T, Chen L Y 2021 J. Alloys Compd. 868 159282 Google Scholar
[29]	Liu X Y, Ohotnicky P P, Adams J B, Lane Rohrer C, Hyland R W 1997 Surf. Sci. 373 357 Google Scholar
[30]	Plimpton S 1995 J. Comput. Phys. 117 1 Google Scholar
[31]	Stukowski A 2010 Model. Simul. Mater. Sci. Eng. 18 015012 Google Scholar
[32]	Faken D, Jónsson H 1994 Comp. Mater. Sci. 2 279 Google Scholar
[33]	Stukowski A, Bulatov V V, Arsenlis A 2012 Model. Simul. Mater. Sci. Eng. 20 08500
[34]	Esteban-Manzanares G, Bellón B, Martínez E, Papadimitriou I, LLorca J 2019 J. Mech. Phys. Solids 132 103675 Google Scholar
[35]	Simar A, Voigt H J L, Wirth B D 2011 Comput. Mater. Sci. 50 1811 Google Scholar
[36]	Jian W R, Zhang M, Xu S, Beyerlein I J 2020 Model. Simul. Mater. Sci. Eng. 28 045004 Google Scholar

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