Softening of nanocrystalline metals at very small grain sizes

Nature

Volumn 391, Issue 6667, 1998, Pages 561-563

  Schiøtz, Jakob ^a   Di Tolla, Francesco D ^a,b   Jacobsen, Karsten W ^a  

^a TECHNICAL UNIVERSITY OF DENMARK   (Denmark)

^b SISSA   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

COPPER; METAL;

ARTICLE; CRYSTALLIZATION; MATERIAL STATE; METALLURGY; PARTICLE SIZE; PRIORITY JOURNAL; STRESS STRAIN RELATIONSHIP; THERMODYNAMICS;

EID: 0032484975     PISSN: 00280836     EISSN: None     Source Type: Journal    
DOI: 10.1038/35328     Document Type: Article

References (25)

1. Siegel, R. W. in Encyclopedia of Applied Physics Vol. 11, 173-199 (VCH, New York, 1994).
2. Siegel, R. W. What do we really know about the atomic-scale structure of nanophase materials? J. Phys. Chem. Solids 55, 1097-1106 (1994).
3. Siegel, R. W. & Fougere, G. E. in Nanophase Materials: Synthesis-Properties-Applications (eds Hadjipanayis, G. C. & Siegel, R. W.) 233-261 (NATO-ASI Ser. E, Vol. 260, Kluwer, Dordrecht, 1994).
4. Gleiter, H. in Mechanical Properties and Deformation Behavior of Materials Having Ultra-Fine Microstructures (ed. Nastasi, M.) 3-35 (Kluwer, Dordrecht, 1993).
5. Hall, E. O. The deformation and ageing of mild steel: III Discussion of results. Proc. Phys. Soc. Lond. B 64, 747-753 (1951).
6. Petch, N. J. The cleavage of polycrystals. J. Iron Steel Inst. 174, 25-28 (1953).
7. Chokshi, A. H., Rosen, A., Karch, J. & Gleiter, H. On the validity of the Hall-Petch relationship in nanocrystalline materials. Scripta Metall. 23, 1679-1684 (1989).
8. Voronoi, G. Z. Reine Angew. Math. 134, 199 (1908).
9. Jacobsen, K, W., Nørskov, J. K. & Puska, M. J. Interatomic interactions in the effective-medium theory. Phys. Rev. B 35, 7423-7442 (1987).
10. Jacobsen, K. W., Stoltze, P. & Nørskov, J. K, A semi-empirical effective medium theory for metals and alloys. Surf. Sci. 366, 394-402 (1996).
11. Jónsson, H. & Andersen, H. C. Icosahedral ordering in the Lennard-Jones liquid and glass. Phys. Rev. Lett. 60, 2295-2298 (1988).
12. Clarke, A. S. & Jónsson, H. Structural changes accompanying densification of random-sphere Packings. Phys. Rev. E 47, 3975-3984 (1993).
13. Gschneidner, K. A. Physical properties and interrelationships of metallic and semimetallic elements. Solid State Phys. 16, 275-426 (1964).
14. Shen, T. D., Koch, C. C., Tsui, T. Y. & Pharr, G. M. On the elastic moduli of nanocrystalline Fe, Cu, Ni, and Cu-Ni alloys prepared by mechanical milling/alloying. J. Mater. Res. 10, 2892-2896 (1995).
15. Kluge, M. D., Wolf, D., Lutsko, J. F. & Phillpot, S. R. Formalism for the calculation of local elastic constants at grain boundaries by means of atomistic simulation. J. Appl. Phys. 67, 2370-2379 (1990).
16. Phillpot, S. R., Wolf, D. & Gleiter, H. Molecular-dynamics study of the synthesis and characterization of a fully dense, three-dimensional nanocrystalline material. J. Appl. Phys. 78, 847-860 (1995).
17. Chokshi, A. H., Mukherjee, A. K. & Langdon, T. G. Superplasticity in advanced materials. Mater. Sci. Eng. R 10, 237-274 (1993).
18. Ridley, N. (ed.) Superplasticity: 60 years after Pearson (Institute of Metals, London, 1995).
19. Nieman, G. W., Weertman, J, R. & Siegel, R. W. Mechanical behavior of nanocrystalline Cu and Pd. J. Mater. Res. 6, 1012-1027 (1991).
20. Nieh, T. G. & Wadsworth, J. Hall-Petch relation in nanocrystalline solids. Scripta Met. Mater. 25, 955-958 (1991).
21. Lian, J., Baudelet, B. & Nazarov, A. A. Model for the prediction of the mechanical behaviour of nanocrystalline materials. Mater. Sci. Eng. A 172, 23-29 (1993).
22. Langdon, T. G. The significance of grain boundaries in the flow of polycrystalline materials. Mater. Sci. Forum 189-190 31-42 (1995).
23. Suryanarayanan, R. et al. Mechanical properties of nanocrystalline copper produced by solution-phase synthesis. J. Mater. Res. 11, 439-448 (1996).
24. Weertman, J. R. Hall-Petch strengthening in nanocrystalline metals. Mater. Sci. Eng. A 166, 166-167 (1993).
25. Van Swygenhoven, H. & Caro, A. Plastic behavior of nanophase Ni: A molecular dynamics computer simulation. Appl. Phys. Lett. 71, 1652-1654 (1997).