Competing grain-boundary- and dislocation-mediated mechanisms in plastic strain recovery in nanocrystalline aluminum

Proceedings of the National Academy of Sciences of the United States of America

Volumn 106, Issue 38, 2009, Pages 16108-16113

  Li, Xiaoyan ^a   Wei, Yujie ^a,d   Yang, Wei ^b,c   Gao, Huajian ^a  

^a Brown University   (United States)

^b ZHEJIANG UNIVERSITY   (China)

^c TSINGHUA UNIVERSITY   (China)

^d University of Alabama   (United States)

Author keywords

Grain boundary diffusion; Grain boundary sliding; Molecular dynamics simulation

Indexed keywords

ALUMINUM; NANOCRYSTAL; PLASTIC;

ARTICLE; CONTROLLED STUDY; MOLECULAR DYNAMICS; PARTICLE SIZE; PRIORITY JOURNAL; SIMULATION;

ALUMINUM; CRYSTALLIZATION; MODELS, CHEMICAL; NANOSTRUCTURES; NANOTECHNOLOGY; PLASTICS; SURFACE PROPERTIES; THERMODYNAMICS;

EID: 70349479549     PISSN: 00278424     EISSN: 10916490     Source Type: Journal    
DOI: 10.1073/pnas.0901765106     Document Type: Article

References (33)

1. Schiøtz J, Di Tolla FD, Jacobsen KW (1998) Softening of nanocrystalline metals at very small grain sizes. Nature 391:561-563. (Pubitemid 28157591)
2. Lu L, Sui ML, Lu K (2000) Superplastic extensibility of nanocrystalline copper at room temperature. Science 287:1463-1466. (Pubitemid 30127134)
3. Yamakov V, Wolf D, Phillpot SR, Gleiter H (2002) Grain-boundary diffusion creep in nanocrystalline palladium by molecular-dynamics simulation. Acta Mater 50:61-73. (Pubitemid 33143477)
4. Schiøtz J, Jacobsen KW (2003) A maximum in the strength of nanocrystalline copper. Science 301:1357-1359.
5. Yamakov V, Wolf D, Phillpot SR, Mukherjee AK, Gleiter H (2004) Deformation-mechanism map for nanocrystalline metals by molecular-dynamics simulation. Nat Mater 3:43-47.
6. Yip S (2004) Nanocrystalline metals: Mapping plasticity. Nat Mater 3:11-12.
7. Wolf D, Yamakov V, Phillpot SR, Mukherjee A, Gleiter H (2005) Deformation of nanocrystalline materials by molecular-dynamics simulation: Relationship to experiments? Acta Mater 53:1-40.
8. Ashby MF (1969) Interface-reaction control of Nabarro-Herring creep and sintering. Scr Metall 3:837-842.
9. Ashby MF (1972) Boundary defects, and atomistic aspects of boundary sliding and diffusional creep. Surf Sci 31:498-542.
10. Arzt E, Ashby MF, Verrall RA (1983) Interface controlled diffusional creep. Acta Metall 31:1977-11789
11. Cocks ACF (1992) Interface reaction controlled creep. Mech Mater 13:165-174.
12. Yang W, Wang HT (2004) Mechanics modeling for deformation of nano-grained metals. J Mech Phys Solids 52:875-889.
13. Langdon TG (2006) Grain boundary sliding revisited: Developments in sliding over four decades. J Mater Sci 41:597-609.
14. Wei YJ, Bower AF, Gao HJ (2007) Recoverable creep deformation due to heterogeneous grain-boundary diffusion and sliding. Scrip Mater 57:933-936. (Pubitemid 47314343)
15. Rajagopalan J, Han JH, Saif MTA (2007) Plastic deformation recovery in freestanding nanocrystalline aluminum and gold thin film. Science 315:1831-1834. (Pubitemid 46580139)
16. Wei XD, Kysar JW (2008) Plastic strain recovery of free-standing nanocrystalline Cu films. 2008 Spring Meeting of MRS, Symposium U3.7.
17. Wei XD, Kysar JW (2008) Strain recovery driven by grain-boundary diffusion for nanocrystalline thin films. 2008 Fall Meeting of MRS, Symposium EE2.8.
18. Lonardelli I, Almer J, Ischia G, Menaoace C, Molinar A (2008) Deformation behavior in bulk nanocrystalline-ultrafine aluminum: In situ evidence of plastic strain recovery. Scrip Mater 60:520-523.
19. Wei YJ, Bower AF, Gao HJ (2008) Recoverable creep deformation and transient local stress concentration due to heterogeneous grain-boundary diffusion and sliding in polycrystalline solids. J Mech Phys Solids 56:1460-1483.
20. Van Swygenhoven H, Farkas D, Caro A (2000) Grain boundary structures in polycrystalline metals at the nanoscale. Phys Rev B 62:831-838.
21. Li XY, Yang W (2006) Atomistic simulations for the evolution of a U-shaped dislocation in fcc Al. Phys Rev B 74:144108.
22. Van Swygenhoven H, Spaczer M, Caro A, Farkas D (1999) Competing plastic deformation mechanisms in nanophase metal. Phys Rev B 60:22-25.
23. Schiøtz J, Vegge T, Di Tolla FD, Jacobsen KW (1999) Atomic-scale simulations of the mechanical deformation of nanocrystalline metals. Phys Rev B 60:11971-11983.
24. Kwok T, Ho PS, Yip S, Balluffi RW, Bristowe PD, Brokamn A (1981) Evidence for vacancy mechanism in grain boundary diffusion in bcc iron: A molecular dynamics study. Phys Rev Lett 47:1148-1151.
25. Rakitin RY, Poletaev GM, Aksenove MS, Starostenkov MD (2005) Mechanisms of grain-boundary diffusion in two-dimensional metals. Tech Phys Lett 31:650-652.
26. Humphreys FJ, Hatherly M (1996) in Recrystallization and related annealing phenomena, (Pergamon Press, Oxford), pp 363-392.
27. Van Swygenhoven H, Derlet PM, Frøseth AG (2006) Nucleation and propagation of dislocations in nanocrystalline fcc metal. Acta Mater 54:1975-1983.
28. Wei YJ, Bower AF, Gao HJ (2008) Enhanced strain-rate sensitivity in fcc nanocrystals due to grain-boundary diffusion and sliding. Acta Mater 56:1741-1752.
29. Mishin M, Farkas D, Mehl MJ, Papaconstantopoulos DA (1999) Interatomic potential for monoatomic metals from experimental data and ab initio calculations. Phys Rev B 59:3393-3407.
30. Gall K, Diao JK, Dunn ML (2004) The strength of gold nanowires. Nano Lett 4:2431-2436.
31. Nose SA (1984) A unified formulation of the constant temperature molecular dynamics methods. J Chem Phys 81:511-519.
32. Hoover WG (1985) Canonical dynamics: Equilibrium phase-space distributions. Phys Rev A 31:1695-1697.
33. Tuckerman M, Berne BJ, Mantyna GJ (1992) Reversible multiple time scale molecular dynamics. J Chem Phys 97:1990-2001.