Molecular dynamics study on low temperature brittleness in tungsten single crystals

International Journal of Fracture

Volumn 107, Issue 2, 2001, Pages 139-158

  Furuya, Y ^a   Noguchi, H ^a   Schmauder, S ^a  

^a KYUSHU UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

COMPOSITE MICROMECHANICS; CRACKS; DISLOCATIONS (CRYSTALS); FRACTURE TOUGHNESS; LOW TEMPERATURE EFFECTS; MATHEMATICAL MODELS; MOLECULAR DYNAMICS; SINGLE CRYSTALS; STRENGTH OF MATERIALS; TUNGSTEN;

ATOMIC SCALE REGION; CLEAVAGE; CRACK TIP; DISLOCATION EMISSIONS; LOW TEMPERATURE BRITTLENESS; TEMPERATURE DEPENDENCY;

BRITTLE FRACTURE;

EID: 0035135371     PISSN: 03769429     EISSN: None     Source Type: Journal    
DOI: 10.1023/A:1007695029280     Document Type: Article

References (33)

1. Bucki, M., Novak, V., Savitsky, Y.M., Burkhanov, G.S. and Kirillova, V.M. (1979). Work-hardening in tungsten single crystals between 77 and 1343K. Strength of Metals and Alloys. Proceedings of the 5th International Conference, xxx+760, 145-150.
2. Chou, Y.T. (1967). Dislocation pile-ups against a locked dislocation of different Burgers vector. Journal of Applied Physics 38, 2080-2085.
3. Cordwell, J.E. and Hull, D. (1972). Observation of {110} cleavage in <110> axis tungsten single crystals. Philosophical Magazine, 26(1), 215-224.
4. Eshelby, J.D. (1957). The determination of the elastic field of an ellipsoidal inclusion, and related problems. Proceedings, Royal Society London A241, 376-396.
5. Eshelby, J.D., Frank, F.C. and Nabarro, F.R.N. (1951). The equilibrium of linear arrays of dislocations, Philosophical Magazine 42, 351-364.
6. Finnis, M.W. Sinclair, J.E. (1984). A simple empirical N-body potential for transition metals. Philosophical Magazine A50, 45-55.
7. Furuya, Y. and Noguchi, H. (1998). A combined method of molecular dynamics with micromechanics improved by moving the molecular dynamics region successively in the simulation of elastic-plastic crack propagation. International Journal of Fracture 94, 17-31.
8. Furuya, Y. and Noguchi, H. (1999). Simulation of crack propagation with (molecular dynamics + micromechanics) model. Proceedings of 9th CIMTEC 18, 57-64.
9. George, A. and Michot, G. (1993). Dislocation loops at crack tips: nucleation and growth - an experimental study in silicon. Materials Science and Engineering A164, 118-134.
10. Gumbsch, R., Riedle, J Hurtmaier, A. and Fischmeister, H. (1998). Controlling factors for the brittle-to-ductile transition in tungsten single crystals. Science 282, 1293-1295.
11. Ha, K.F., Yang, C. and Bao. J.S. (1994). Effect of dislocation density on the ductile-brittle transition in bulk Fe-3%Si single crystals. Scripta Metallurgica et Materialia 30(8), 1065-1070.
12. Hirsch, P.B. and Roberts, S.G. (1991). The brittle-to-ductile transition in silicon. Philosophical Magazine A64, 55-80.
13. Hirth, J.R, Hoagland, R.G. and Gehlen, P.C. (1974). The interaction between line force arrays and planar cracks. International Journal of Solids and Structures 10(9), 977-984.
14. John, C.St. (1975). The briltle-to-ductile transition in precleaved silicon single crystals. Philosophical Magazine 32, 1193-1212.
15. Kohlhoff, S., Gumbsch, P. and Eichmeister, H.F. (1991). Crack propagation in b.c.c. crystals studied with a combined finite-element and atomistic model. Philosophical Magazine 64(4), 851-878.
16. Kohlhoff, S. and Schmauder, S. (1988). A new method for coupled elastic-atomistic modeling. (Edited by V. Vitek and D.J. Srolovitz), Large Atomistic Simulation of Materials - Beyond Pair Potentials - Plenum Press, New York, 411-418.
17. Lekhnitski, S.G. (1968). Anisotropic Plates Gordon and Breach. New York.
18. Mueda, K. (1992), Effect of crack blunting on dislocation-mobility-controlled brittle-ductile transition. Scripta Metallurgica et Materialia 27, 805-809.
19. Michot, G., Loyola de Oliveria, M.A. and George, A. (1994). Dislocation loops at crack tips: control and analysis of sources in silicon. Materials Science and Engineering A176, 99-109.
20. Mullins, M. and Dokanish, F. (1982). Simulation of the (001) Plane Crack in α-Iron Employing a New Boundary Scheme. Philosophical Magazine 46(5), 771-787.
21. Mullins, M. (1982). Molecular Dynamics Simulation of Propagating Cracks. Scripta Metallurgica 16, 663-666.
22. Mura, T. (1968). The continuum theory of dislocations. Advances in Materials Research (edited by H. Herman H.), Interscience Publ., New York, 1-107.
23. Narita, N., Higashida, K., Torii, T. and Miyaki, S. (1989). Crack-tip shielding by dislocations and fracture toughness in NaCl crystals. Materials Transactions, JIM 3O, 895-907.
24. Noguchi, H. and Furuya, Y (1997). A method of seamlessly combining a crack tip molecular dynamics enclave with a linear elastic outer domain in simulating elastic-platic crack advance. International Journal of Fracture 87, 309-329.
25. Rice, J.R. (1974). Limitations to the small scale yielding approximation for crack tip plasticity. Journal of the Mechanics and Physics of Solids 22, 17-26.
26. Rice, J.R. (1992). Dislocation nucleation from a crack tip: an analysis based on the Peierls concept. Journal of the Mechanics and Physics of Solids 40, 239-271.
27. Rice, J.R. and Beltz, G.E. (1994). The activation energy for dislocation nueleation at a crack tip. Journal of the Mechanics and Physics of Solids 42, 333-360.
28. Rice, J.R. and Thomson, R. (1974). Ductile versus brittle behavior of crystals. Philosophical Magazine 29, 73-97.
29. Riedle, J., Gumbsch, P. and Fischmeister, H.F. (1994). Fracture studies of tungsten single crystals. Materials Letters 20, 311-317.
30. Sinclair, J.E., Gehlen, P.C., Hoagland, R.G. and Hirth, J.R (1978). Flexible boundary conditions and nonlinear geometric effects in atomic dislocation modeling. Journal of Applied Physics 49(7), 3890-3897.
31. Xu, G. and Argon, A.S. (1995). Nucleation of dislocations from crack tips under mixed modes of loading: implications for brittle against ductile behavior of crystals. Philosophical Magazine A72, 415-451.
32. Yang, W., Tan, H. and Guo, T. (1994). Evolution of crack tip process zones. Modeling and Simulation in Materials Science and Engineering 2, 767-782.
33. Zhou, S.J. and Thomson, R. (1991). Dislocation emission at ledges on cracks. Journal of Materials Research 6, 639-653.