金属材料的晶界塑性变形机制
收稿日期: 2021-12-23
修回日期: 2022-04-07
网络出版日期: 2022-04-22
基金资助
国家自然科学基金项目(51771172);国家自然科学基金项目(52071284)
Grain Boundary Dominated Plasticity in Metallic Materials
Received date: 2021-12-23
Revised date: 2022-04-07
Online published: 2022-04-22
Supported by
National Natural Science Foundation of China(51771172);National Natural Science Foundation of China(52071284)
王江伟 , 陈映彬 , 祝祺 , 洪哲 , 张泽 . 金属材料的晶界塑性变形机制[J]. 金属学报, 2022 , 58(6) : 726 -745 . DOI: 10.11900/0412.1961.2021.00594
Grain boundaries (GBs) are important planar defects in polycrystalline materials, and they are crucial in plastic deformation and recrystallization of materials. A fundamental understanding of GB deformation kinetics is critical for material design using GB engineering. Although GB dominated structural evolutions have been reported to proceed via different modes, the disconnection-based model has recently become a widely acknowledged approach to unify the GB dominated plasticity. In this paper, recent progresses of GB dominated plasticity in metallic materials based on disconnection-mediated GB migration have been reviewed. Disconnection dynamics, including nucleation, propagation and interactions between different disconnections, were found dominating the shear-coupled GB migration. Lateral motion of different GB disconnections contributes to the overall GB migration, during which dynamic interactions prevail. In the three-dimensional network of GBs, GB-defect interaction and triple junctions can further influence the shear-coupled GB migration by providing extra disconnection sources, which readily change the intrinsic disconnection dynamics. These disconnection-based GB kinetics are generally applicable in the migration of GBs with different structures, as well as other modes of GB dominated deformation. Based on the aforementioned, the effects of GB plasticity on mechanical properties and deformation of metallic materials are further discussed. This review provides a unified understanding of disconnection-based GB plasticity, which not only enriches mechanistic understanding of interface plasticity in metallic materials but also holds important implications for GB engineering toward advanced high-performance metallic materials.
| 1 | Taylor G I. The mechanism of plastic deformation of crystals. Part I.—Theoretical [J]. Proc. Roy. Soc., 1934, 145A: 362 |
| 2 | Taylor G I. The mechanism of plastic deformation of crystals. Part II.—Comparison with observations [J]. Proc. Roy. Soc., 1934, 145A: 388 |
| 3 | Hirsch P B, Horne R W, Whelan M J. Direct observations of the arrangement and motion of dislocations in aluminum [J]. Philos. Mag., 1956, 1: 677 |
| 4 | Frank F C. Crystal dislocations—Elementrary concepts and definitions [J]. Philos. Mag., 1951, 42: 809 |
| 5 | Bilby B A, Bullough R, Smith E. Continuous distributions of dislocations: A new application of the methods of non-Riemannian geometry [J]. Proc. Roy. Soc., 1955, 231A: 263 |
| 6 | Read W T, Shockley W. Dislocation models of crystal grain boundaries [J]. Phys. Rev., 1950, 78: 275 |
| 7 | Han J, Thomas S L, Srolovitz D J. Grain-boundary kinetics: A unified approach [J]. Prog. Mater. Sci., 2018, 98: 386 |
| 8 | Pond R C, Bollmann W. The symmetry and interfacial structure of bicrystals [J]. Philos. Trans. Roy. Soc., 1979, 292A: 449 |
| 9 | Sutton A P, Vitek V. On the structure of tilt grain boundaries in cubic metals II. Asymmetrical tilt boundaries [J]. Philos. Trans. Roy. Soc., 1983, 309A: 37 |
| 10 | Sutton A P, Vitek V. On the structure of tilt grain boundaries in cubic metals I. Symmetrical tilt boundaries [J]. Philos. Trans. Roy. Soc., 1983, 309A: 1 |
| 11 | Rittner J D, Seidman D N. <110> symmetric tilt grain-boundary structures in fcc metals with low stacking-fault energies [J]. Phys. Rev., 1996, 54B: 6999 |
| 12 | Hirth J P, Pond R C. Steps, dislocations and disconnections as interface defects relating to structure and phase transformations [J]. Acta Mater., 1996, 44: 4749 |
| 13 | Khater H A, Serra A, Pond R C, et al. The disconnection mechanism of coupled migration and shear at grain boundaries [J]. Acta Mater., 2012, 60: 2007 |
| 14 | Pond R C, Hirth J P. Defects at surfaces and interfaces [J]. Solid State Phys., 1994, 47: 287 |
| 15 | Hirth J P, Hirth G, Wang J. Disclinations and disconnections in minerals and metals [J]. Proc. Natl. Acad. Sci. USA, 2020, 117: 196 |
| 16 | Howe J M, Pond R C, Hirth J P. The role of disconnections in phase transformations [J]. Prog. Mater. Sci., 2009, 54: 792 |
| 17 | Hirth J P, Wang J, Tomé C N. Disconnections and other defects associated with twin interfaces [J]. Prog. Mater. Sci., 2016, 83: 417 |
| 18 | Meyers M A, Mishra A, Benson D J. Mechanical properties of nanocrystalline materials [J]. Prog. Mater. Sci., 2006, 51: 427 |
| 19 | Greer J R, De Hosson J T M. Plasticity in small-sized metallic systems: Intrinsic versus extrinsic size effect [J]. Prog. Mater. Sci., 2011, 56: 654 |
| 20 | Watanabe T, Tsurekawa S. The control of brittleness and development of desirable mechanical properties in polycrystalline systems by grain boundary engineering [J]. Acta Mater., 1999, 47: 4171 |
| 21 | Okada T, Hisazawa H, Iwasaki A, et al. Grain-boundary sliding and its accommodation at triple junctions in aluminum and copper tricrystals [J]. Mater. Trans., 2019, 60: 86 |
| 22 | Winning M, Rollett A D. Transition between low and high angle grain boundaries [J]. Acta Mater., 2005, 53: 2901 |
| 23 | Winning M, Gottstein G, Shvindlerman L S. Stress induced grain boundary motion [J]. Acta Mater., 2001, 49: 211 |
| 24 | Molodov D A, Ivanov V A, Gottstein G. Low angle tilt boundary migration coupled to shear deformation [J]. Acta Mater., 2007, 55: 1843 |
| 25 | Molodov D A, Gorkaya T, Gottstein G. Migration of the Σ7 tilt grain boundary in Al under an applied external stress [J]. Scr. Mater., 2011, 65: 990 |
| 26 | Legros M, Gianola D S, Hemker K J. In situ TEM observations of fast grain-boundary motion in stressed nanocrystalline aluminum films [J]. Acta Mater., 2008, 56: 3380 |
| 27 | Wang L H, Teng J, Liu P, et al. Grain rotation mediated by grain boundary dislocations in nanocrystalline platinum [J]. Nat. Commun., 2014, 5: 4402 |
| 28 | Zhu Q, Cao G, Wang J W, et al. In situ atomistic observation of disconnection-mediated grain boundary migration [J]. Nat. Commun., 2019, 10: 156 |
| 29 | Imrich P J, Kirchlechner C, Motz C, et al. Differences in deformation behavior of bicrystalline Cu micropillars containing a twin boundary or a large-angle grain boundary [J]. Acta Mater., 2014, 73: 240 |
| 30 | Mompiou F, Caillard D, Legros M. Grain boundary shear-migration coupling—I. In situ TEM straining experiments in Al polycrystals [J]. Acta Mater., 2009, 57: 2198 |
| 31 | Rajabzadeh A, Legros M, Combe N, et al. Evidence of grain boundary dislocation step motion associated to shear-coupled grain boundary migration [J]. Philos. Mag., 2013, 93: 1299 |
| 32 | Rajabzadeh A, Mompiou F, Lartigue-Korinek S, et al. The role of disconnections in deformation-coupled grain boundary migration [J]. Acta Mater., 2014, 77: 223 |
| 33 | Babcock S E, Balluffi R W. Grain boundary kinetics—I. In situ observations of coupled grain boundary dislocation motion, crystal translation and boundary displacement [J]. Acta Metall., 1989, 37: 2357 |
| 34 | Babcock S E, Balluffi R W. Grain boundary kinetics—II. In situ observations of the role of grain boundary dislocations in high-angle boundary migration [J]. Acta Metall., 1989, 37: 2367 |
| 35 | Jin M, Minor A M, Stach E A, et al. Direct observation of deformation-induced grain growth during the nanoindentation of ultrafine-grained Al at room temperature [J]. Acta Mater., 2004, 52: 5381 |
| 36 | Shan Z W, Stach E A, Wiezorek J M K, et al. Grain boundary-mediated plasticity in nanocrystalline nickel [J]. Science, 2004, 305: 654 |
| 37 | Rupert T J, Gianola D S, Gan Y, et al. Experimental observations of stress-driven grain boundary migration [J]. Science, 2009, 326: 1686 |
| 38 | Caillard D, Mompiou F, Legros M. Grain-boundary shear-migration coupling. II. Geometrical model for general boundaries [J]. Acta Mater., 2009, 57: 2390 |
| 39 | Kheradmand N, Vehoff H, Barnoush A. An insight into the role of the grain boundary in plastic deformation by means of a bicrystalline pillar compression test and atomistic simulation [J]. Acta Mater., 2013, 61: 7454 |
| 40 | Wang L, Zhao F, Zhao F P, et al. Grain boundary orientation effects on deformation of Ta bicrystal nanopillars under high strain-rate compression [J]. J. Appl. Phys., 2014, 115: 053528 |
| 41 | Kim Y, Lee S, Jeon J B, et al. Effect of a high angle grain boundary on deformation behavior of Al nanopillars [J]. Scr. Mater., 2015, 107: 5 |
| 42 | Li L L, Zhang Z J, Tan J, et al. Stepwise work hardening induced by individual grain boundary in Cu bicrystal micropillars [J]. Sci. Rep., 2015, 5: 15631 |
| 43 | Kaira C S, Singh S S, Kirubanandham A, et al. Microscale deformation behavior of bicrystal boundaries in pure tin (Sn) using micropillar compression [J]. Acta Mater., 2016, 120: 56 |
| 44 | Gu X W, Loynachan C N, Wu Z X, et al. Size-dependent deformation of nanocrystalline Pt nanopillars [J]. Nano Lett., 2012, 12: 6385 |
| 45 | Jang D, Greer J R. Size-induced weakening and grain boundary-assisted deformation in 60 nm grained Ni nanopillars [J]. Scr. Mater., 2011, 64: 77 |
| 46 | Merkle K L, Thompson L J. Atomic-scale observation of grain boundary motion [J]. Mater. Lett., 2001, 48: 188 |
| 47 | Merkle K L, Thompson L J, Phillipp F. High-resolution electron microscopy at a (113) symmetric Thermally activated step motion observed by tilt grain-boundary in aluminium [J]. Philos. Mag. Lett., 2002, 82: 589 |
| 48 | Merkle K L, Thompson L J, Phillipp F. Collective effects in grain boundary migration [J]. Phys. Rev. Lett., 2002, 88: 225501 |
| 49 | Merkle K L, Thompson L J, Phillipp F. Dynamics of grain boundary motion at the atomic level [J]. MRS Online Proc. Libr., 2004, 819: 61 |
| 50 | Merkle K L, Thompson L J, Phillipp F. In-situ HREM studies of grain boundary migration [J]. Interface Sci., 2004, 12: 277 |
| 51 | Merkle K L, Thompson L J, Phillipp F. High-resolution electron microscopy at a (113) symmetric Thermally activated step motion observed by tilt grain-boundary in aluminium [J]. Philos. Mag. Lett., 2002, 82: 589 |
| 52 | Radetic T, Ophus C, Olmsted D L, et al. Mechanism and dynamics of shrinking island grains in mazed bicrystal thin films of Au [J]. Acta Mater., 2012, 60: 7051 |
| 53 | Bowers M L, Ophus C, Gautam A, et al. Step coalescence by collective motion at an incommensurate grain boundary [J]. Phys. Rev. Lett., 2016, 116: 106102 |
| 54 | Wang L H, Zhang Y, Zeng Z, et al. Tracking the sliding of grain boundaries at the atomic scale [J]. Science, 2022, 375: 1261 |
| 55 | Wei J K, Feng B, Ishikawa R, et al. Direct imaging of atomistic grain boundary migration [J]. Nat. Mater., 2021, 20: 951 |
| 56 | Wei C Z, Thomas S L, Han J, et al. A Continuum Multi-Disconnection-Mode model for grain boundary migration [J]. J. Mech. Phys. Solids, 2019, 133: 103731 |
| 57 | Zhang L C, Han J, Xiang Y, et al. Equation of motion for a grain boundary [J]. Phys. Rev. Lett., 2017, 119: 246101 |
| 58 | Combe N, Mompiou F, Legros M. Heterogeneous disconnection nucleation mechanisms during grain boundary migration [J]. Phys. Rev. Mater., 2019, 3: 060601 |
| 59 | Combe N, Mompiou F, Legros M. Shear-coupled grain-boundary migration dependence on normal strain/stress [J]. Phys. Rev. Mater., 2017, 1: 033605 |
| 60 | Guo Y L, Wang J C, Wang Z J, et al. Effects of a disconnection dipole on the shear-coupled grain boundary migration [J]. Comput. Mater. Sci., 2015, 109: 253 |
| 61 | Zhang L, Lu C, Tieu K, et al. The shear response of copper bicrystals with Σ11 symmetric and asymmetric tilt grain boundaries by molecular dynamics simulation [J]. Nanoscale, 2015, 7: 7224 |
| 62 | Wan L, Wang S Q. Shear response of the Σ11, <110>{131} symmetric tilt grain boundary studied by molecular dynamics [J]. Model. Simul. Mater. Sci. Eng., 2009, 17: 45008 |
| 63 | Wan L, Wang S Q. Shear response of the Σ9<110>{221} symmetric tilt grain boundary in fcc metals studied by atomistic simulation methods [J]. Phys. Rev., 2010, 82B: 214112 |
| 64 | Combe N, Mompiou F, Legros M. Disconnections kinks and competing modes in shear-coupled grain boundary migration [J]. Phys. Rev., 2016, 93B: 024109 |
| 65 | Thomas S L, Wei C Z, Han J, et al. Disconnection description of triple-junction motion [J]. Proc. Natl. Acad. Sci. USA, 2019, 116: 8756 |
| 66 | Wei C Z, Zhang L C, Han J, et al. Grain boundary triple junction dynamics: A continuum disconnection model [J]. SIAM J. Appl. Math., 2020, 80: 1101 |
| 67 | Cahn J W, Mishin Y, Suzuki A. Coupling grain boundary motion to shear deformation [J]. Acta Mater., 2006, 54: 4953 |
| 68 | Cahn J W, Mishin Y, Suzuki A. Duality of dislocation content of grain boundaries [J]. Philos. Mag., 2006, 86: 3965 |
| 69 | Rae C M F, Smith D A. On the mechanisms of grain boundary migration [J]. Philos. Mag., 1980, 41A: 477 |
| 70 | Guillope M, Poirier J P. A model for stress-induced migration of tilt grain boundaries in crystals of NaCl structure [J]. Acta Metall., 1980, 28: 163 |
| 71 | Fukutomi H, Iseki T, Endo T, et al. Sliding behavior of coincidence grain boundaries deviating from ideal symmetric tilt relationship [J]. Acta Metall. Mater., 1991, 39: 1445 |
| 72 | Zhang L C, Han J, Xiang Y, et al. Equation of motion for a grain boundary [J]. Phys. Rev. Lett., 2017, 119: 246101 |
| 73 | Zhou H F, Li X Y, Wang Y, et al. Torsional detwinning domino in nanotwinned one-dimensional nanostructures [J]. Nano Lett., 2015, 15: 6082 |
| 74 | Song J, Wang J, Liu Y. Characterization of the terrace-defect interfaces using in situ straining techniques [J]. J. Mater. Res., 2021, 36: 2674 |
| 75 | Liebig J P, Mačković M, Spiecker E, et al. Grain boundary mediated plasticity: A blessing for the ductility of metallic thin films? [J]. Acta Mater., 2021, 117079 |
| 76 | Yu Y N. Metallic Principle [M]. 2nd Ed., Beijing: Metallurgical Industry Press, 2013: 411 |
| 76 | 余永宁. 金属学原理 [M]. 第 2版, 北京: 冶金工业出版社, 2013: 441 |
| 77 | Mara N A, Sergueeva A V, Mara T D, et al. Superplasticity and cooperative grain boundary sliding in nanocrystalline Ni3Al [J]. Mater. Sci. Eng. 2007, A463: 238 |
| 78 | Yoshida H, Yokoyama K, Shibata N, et al. High-temperature grain boundary sliding behavior and grain boundary energy in cubic zirconia bicrystals [J]. Acta Mater., 2004, 52: 2349 |
| 79 | Li Q Z, Wang L H, Teng J, et al. In-situ observation of cooperative grain boundary sliding and migration in the nano-twinned nanocrystalline-Au thin-films [J]. Scr. Mater., 2020, 180: 97 |
| 80 | Ovid'ko I A, Valiev R Z, Zhu Y T. Review on superior strength and enhanced ductility of metallic nanomaterials [J]. Prog. Mater. Sci., 2018, 94: 462 |
| 81 | Li Q, Song J, Liu G S, et al. Migration kinetics of twinning disconnections in nanotwinned Cu: An in situ HRTEM deformation study [J]. Scr. Mater., 2021, 194: 113621 |
| 82 | Wang Y B, Sui M L, Ma E. In situ observation of twin boundary migration in copper with nanoscale twins during tensile deformation [J]. Philos. Mag. Lett., 2007, 87: 935 |
| 83 | Lee T C, Robertson I M, Birnbaum H K. TEM in situ deformation study of the interaction of lattice dislocations with grain boundaries in metals [J]. Philos. Mag., 1990, 62A: 131 |
| 84 | Luster J, Morris M A. Compatibility of deformation in two-phase Ti-Al alloys: Dependence on microstructure and orientation relationships [J]. Metall. Mater. Trans., 1995, 26A: 1745 |
| 85 | Kacher J, Robertson I M. Quasi-four-dimensional analysis of dislocation interactions with grain boundaries in 304 stainless steel [J]. Acta Mater., 2012, 60: 6657 |
| 86 | Zhu Q, Zhao S C, Deng C, et al. In situ atomistic observation of grain boundary migration subjected to defect interaction [J]. Acta Mater., 2020, 199: 42 |
| 87 | Kondo S, Mitsuma T, Shibata N, et al. Direct observation of individual dislocation interaction processes with grain boundaries [J]. Sci. Adv., 2016, 2: e1501926 |
| 88 | Wu Z X, Zhang Y W, Srolovitz D J. Deformation mechanisms, length scales and optimizing the mechanical properties of nanotwinned metals [J]. Acta Mater., 2011, 59: 6890 |
| 89 | Kacher J, Eftink B P, Cui B, et al. Dislocation interactions with grain boundaries [J]. Curr. Opin. Solid State Mater. Sci., 2014, 18: 227 |
| 90 | Yu K Y, Bufford D, Khatkhatay F, et al. In situ studies of irradiation-induced twin boundary migration in nanotwinned Ag [J]. Scr. Mater., 2013, 69: 385 |
| 91 | Lin Q Y, An X H, Liu H W, et al. In-situ high-resolution transmission electron microscopy investigation of grain boundary dislocation activities in a nanocrystalline CrMnFeCoNi high-entropy alloy [J]. J. Alloys Compd., 2017, 709: 802 |
| 92 | Zhu T, Gao H J. Plastic deformation mechanism in nanotwinned metals: An insight from molecular dynamics and mechanistic modeling [J]. Scr. Mater., 2012, 66: 843 |
| 93 | Ke X, Ye J C, Pan Z L, et al. Ideal maximum strengths and defect-induced softening in nanocrystalline-nanotwinned metals [J]. Nat. Mater., 2019, 18: 1207 |
| 94 | Wang L H, Han X D, Liu P, et al. In situ observation of dislocation behavior in nanometer grains [J]. Phys. Rev. Lett., 2010, 105: 135501 |
| 95 | Wang L H, Zhang Z, Ma E, et al. Transmission electron microscopy observations of dislocation annihilation and storage in nanograins [J]. Appl. Phys. Lett., 2011, 98: 051905 |
| 96 | Mompiou F, Caillard D, Legros M, et al. In situ TEM observations of reverse dislocation motion upon unloading in tensile-deformed UFG aluminium [J]. Acta Mater., 2012, 60: 3402 |
| 97 | Colla M S, Amin-Ahmadi B, Idrissi H, et al. Dislocation-mediated relaxation in nanograined columnar palladium films revealed by on-chip time-resolved HRTEM testing [J]. Nat. Commun., 2015, 6: 5922 |
| 98 | Li L L, Zhang Z J, Zhang P, et al. Distinct fatigue cracking modes of grain boundaries with coplanar slip systems [J]. Acta Mater., 2016, 120: 120 |
| 99 | Zhang Z F, Li L L, Zhang Z J, et al. Twin boundary: Controllable interface to fatigue cracking [J]. J. Mater. Sci. Technol., 2017, 33: 603 |
| 100 | Zhang Z F, Wang Z G. Dependence of intergranular fatigue cracking on the interactions of persistent slip bands with grain boundaries [J]. Acta Mater., 2003, 51: 347 |
| 101 | Zhang Z F, Wang Z G. Grain boundary effects on cyclic deformation and fatigue damage [J]. Prog. Mater. Sci., 2008, 53: 1025 |
| 102 | Li L L, Zhang P, Zhang Z J, et al. Strain localization and fatigue cracking behaviors of Cu bicrystal with an inclined twin boundary [J]. Acta Mater., 2014, 73: 167 |
| 103 | Li L L, Zhang Z J, Zhang P, et al. Controllable fatigue cracking mechanisms of copper bicrystals with a coherent twin boundary [J]. Nat. Commun., 2014, 5: 3536 |
| 104 | Zhang Z J, Zhang P, Li L L, et al. Fatigue cracking at twin boundaries: Effects of crystallographic orientation and stacking fault energy [J]. Acta Mater., 2012, 60: 3113 |
| 105 | Li L L, Zhang P, Zhang Z J, et al. Intrinsically higher fatigue cracking resistance of the penetrable and movable incoherent twin boundary [J]. Sci. Rep., 2014, 4: 3744 |
| 106 | Zhang P, Zhang Z J, Li L L, et al. Twin boundary: Stronger or weaker interface to resist fatigue cracking? [J]. Scr. Mater., 2012, 66: 854 |
| 107 | Zhang Z J, Li L L, Zhang P, et al. Fatigue cracking at twin boundary: Effect of dislocation reactions [J]. Appl. Phys. Lett., 2012, 101: 011907 |
| 108 | Li L L, Zhang Z J, Zhang P, et al. Higher fatigue cracking resistance of twin boundaries than grain boundaries in Cu bicrystals [J]. Scr. Mater., 2011, 65: 505 |
| 109 | Zhang Z F, Wang Z G. Effects of grain boundaries on cyclic deformation behavior of copper bicrystals and columnar crystals [J]. Acta Mater., 1998, 46: 5063 |
| 110 | Wang A G, An X H, Gu J, et al. Effect of grain size on fatigue cracking at twin boundaries in a CoCrFeMnNi high-entropy alloy [J]. J. Mater. Sci. Technol., 2020, 39: 1 |
| 111 | Li L L, Zhang Z J, Zhang P, et al. Difference in fatigue cracking behaviors of Cu bicrystals with the same component grains but different twin boundaries [J]. Scr. Mater., 2015, 95: 19 |
| 112 | Li L L, Zhang Z J, Zhang P, et al. Shear fatigue cracking of twin boundary and grain boundary without dislocation impingement [J]. Scr. Mater., 2015, 100: 28 |
| 113 | Li L L, Zhang Z J, Zhang P, et al. Deformation behaviors of Cu bicrystals with an inclined twin boundary at multiple scales [J]. J. Mater. Sci. Technol., 2017, 33: 698 |
| 114 | Hanlon T, Kwon Y N, Suresh S. Grain size effects on the fatigue response of nanocrystalline metals [J]. Scr. Mater., 2003, 49: 675 |
| 115 | Cao A J, Wei Y G. Atomistic simulations of crack nucleation and intergranular fracture in bulk nanocrystalline nickel [J]. Phys. Rev., 2007, 76B: 024113 |
| 116 | Zhu Q, Huang Q S, Guang C, et al. Metallic nanocrystals with low angle grain boundary for controllable plastic reversibility [J]. Nat. Commun., 2020, 11: 3100 |
| 117 | Molodov D A, Czubayko U, Gottstein G, et al. On the effect of purity and orientation on grain boundary motion [J]. Acta Mater., 1998, 46: 553 |
| 118 | Zhu Q, Huang Q S, Zhou H F, et al. Inclination-governed deformation of dislocation-type grain boundaries [J]. J. Mater. Res., 2021, 36: 1306 |
| 119 | Ciulik J, Taleff E M. Dynamic abnormal grain growth: A new method to produce single crystals [J]. Scr. Mater., 2009, 61: 895 |
| 120 | Zhu Q, Zhou H F, Chen Y B, et al. Atomistic dynamics of disconnection-mediated grain boundary plasticity: A case study of gold nanocrystals [J]. J. Mater. Sci. Technol., 2022, 125: 182 |
| 121 | Wang Z J, Li Q J, Li Y, et al. Sliding of coherent twin boundaries [J]. Nat. Commun., 2017, 8: 1108 |
| 122 | Kim S H, Park J H, Kim H K, et al. Twin boundary sliding in single crystalline Cu and Al nanowires [J]. Acta Mater., 2020, 196: 69 |
| 123 | Zhu Q, Kong L Y, Lu H M, et al. Revealing extreme twin-boundary shear deformability in metallic nanocrystals [J]. Sci. Adv., 2021, 7: eabe4758 |
| 124 | Upmanyu M, Srolovitz D J, Lobkovsky A E, et al. Simultaneous grain boundary migration and grain rotation [J]. Acta Mater., 2006, 54: 1707 |
| 125 | Chen Y B, Huang Q S, Zhu Q, et al. Coordinated grain boundary deformation governed nanograin annihilation in shear cycling [J]. J. Mater. Sci. Technol., 2021, 86: 180 |
| 126 | Basak A, Gupta A. Simultaneous grain boundary motion, grain rotation, and sliding in a tricrystal [J]. Mech. Mater., 2015, 90: 229 |
| 127 | Wang L H, Teng J, Liu P, et al. Grain rotation mediated by grain boundary dislocations in nanocrystalline platinum [J]. Nat. Commun., 2014, 5: 4402 |
| 128 | Li J J, Soh A K, Wu X L. On nanograin rotation by dislocation climb in nanocrystalline materials [J]. Scr. Mater., 2014, 78-79: 5 |
| 129 | Murayama M, Howe J M, Hidaka H, et al. Atomic-level observation of disclination dipoles in mechanically milled, nanocrystalline Fe [J]. Science, 2002, 295: 2433 |
| 130 | Thomas S L, Chen K T, Han J, et al. Reconciling grain growth and shear-coupled grain boundary migration [J]. Nat. Commun., 2017, 8: 1764 |
| 131 | Upmanyu M, Srolovitz D J, Shvindlerman L S, et al. Molecular dynamics simulation of triple junction migration [J]. Acta Mater., 2002, 50: 1405 |
| 132 | Chen Y B, Zhao S C, Huang Q S, et al. A geometrical model for grain boundary migration mediated formation of multifold twins [J]. Int. J. Plast., 2022, 148: 103128 |
| 133 | Chen Y B, Huang Q S, Zhao S C, et al. Penta-twin destruction by coordinated twin boundary deformation [J]. Nano Lett., 2021, 21: 8378 |
| 134 | Yu T B, Hansen N, Huang X X. Recovery by triple junction motion in aluminium deformed to ultrahigh strains [J]. Proc. Roy. Soc., 2011, 467A: 3039 |
| 135 | Yu T B, Hansen N, Huang X X. Linking recovery and recrystallization through triple junction motion in aluminum cold rolled to a large strain [J]. Acta Mater., 2013, 61: 6577 |
| 136 | Yu T B, Hughes D A. Strong pinning of triple junction migration for robust high strain nanostructures [J]. Philos. Mag., 2019, 99: 869 |
| 137 | Yu T B, Hughes D A, Hansen N, et al. In situ observation of triple junction motion during recovery of heavily deformed aluminum [J]. Acta Mater., 2015, 86: 269 |
| 138 | Shuai L F, Huang T L, Yu T B, et al. Segregation and precipitation stabilizing an ultrafine lamellar-structured Al-0.3%Cu alloy [J]. Acta Mater., 2021, 206: 116595 |
| 139 | Gifkins R C. Grain-boundary sliding and its accommodation during creep and superplasticity [J]. Metall. Trans., 1976, 7A: 1225 |
| 140 | Kaibyshev O A, Pshenichniuk A I, Astanin V V. Superplasticity resulting from cooperative grain boundary sliding [J]. Acta Mater., 1998, 46: 4911 |
| 141 | Van Swygenhoven H, Derlet P M. Grain-boundary sliding in nanocrystalline fcc metals [J]. Phys. Rev., 2001, 64B: 224105 |
| 142 | Bobylev S V, Morozov N F, Ovid'ko I A. Cooperative grain boundary sliding and migration process in nanocrystalline solids [J]. Phys. Rev. Lett., 2010, 105: 055504 |
| 143 | Ovid'ko I A, Sheinerman A G. Grain boundary sliding, triple junction disclinations and strain hardening in ultrafine-grained and nanocrystalline metals [J]. Int. J. Plast., 2017, 96: 227 |
| 144 | Hasnaoui A, Van Swygenhoven H, Derlet P M. Cooperative processes during plastic deformation in nanocrystalline fcc metals: A molecular dynamics simulation [J]. Phys. Rev., 2002, 66B: 184112 |
| 145 | Li J J, Soh A K. Synergy of grain boundary sliding and shear-coupled migration process in nanocrystalline materials [J]. Acta Mater., 2013, 61: 5449 |
| 146 | Ovid'ko I A, Sheinerman A G, Aifantis E C. Effect of cooperative grain boundary sliding and migration on crack growth in nanocrystalline solids [J]. Acta Mater., 2011, 59: 5023 |
| 147 | Yu M, Fang Q H, Feng H, et al. Effect of cooperative grain boundary sliding and migration on dislocation emitting from a semi-elliptical blunt crack tip in nanocrystalline solids [J]. Acta Mech., 2014, 225: 2005 |
| 148 | Feng H, Fang Q H, Zhang L C, et al. Effect of cooperative grain boundary sliding and migration on emission of dislocations from a crack tip in nanocrystalline materials [J]. Mech. Mater., 2013, 61: 39 |
| 149 | Zhao Y X, Fang Q H, Liu Y W. Effect of cooperative nanograin boundary sliding and migration on dislocation emission from a blunt nanocrack tip in nanocrystalline materials [J]. Philos. Mag., 2014, 94: 700 |
| 150 | Lejček P. Grain Boundary Segregation in Metals [M]. Berlin, Heidelberg: Springer, 2010: 1 |
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