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Atomistic Aspects of Crack Propagation Along High Angle Grain Boundaries

Published online by Cambridge University Press:  15 February 2011

Diana Farkas*
Affiliation:
Department of Materials Science and Engineering, Virginia Polytechnic Institute, Blacks-burg, VA 24061.
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Abstract

We present atomistic simulations of the crack tip configuration near a high angle Σ= 5 [001](210) symmetrical tilt grain boundary in NiAl. The simulations were carried out using molecular statics and embedded atom (EAM) potentials. The cracks are stabilized near a Griffith condition involving the cohesive energy of the grain boundary. The atomistic configurations of the tip region are different in the presence of the high angle grain boundary than in the bulk. Three different configurations of the grain boundary were studied corresponding to different local compositions. It was found that in ordered NiAl, cracks along symmetrical tilt boundaries show a more brittle behavior for Al rich boundaries than for Ni-rich boundaries. Lattice trapping effects in grain boundary fracture were found to be more significant than in the bulk.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

1. Sih, G. C. and Liebowitz, H., Mathematical theories of brittle fracture, in Fracture - An Advanced Treatise, edited by Liebowitz, H., voiume II, pages 69189. Academic Press, New York, 1968.Google Scholar
2. Shastry, V. and Farkas, D., (1996), to appear.Google Scholar
3. Farkas, D., Mutasa, B., Vailhé, C., and Ternes, K., Modelling and Simulation in Materials Science and Engineering 3, 201 (1994).CrossRefGoogle Scholar
4. Petton, G. and Farkas, D., Scripta Metallurgica et Materialia 25, 55 (1991).Google Scholar
5. Mishin, Y. and Farkas, D., Phil. Mag., (1996).Google Scholar
6. Hagen, M. and Finnis, M. W., Materials Science Forum 207–209, 245 (1996).Google Scholar
7. George, E. and Liu, C., Journal of Materials Research 5, 754 (1990).Google Scholar
8. Liu, C.. Moisture-induced environmental embrittlement of ordered intermetallic alloy at ambient temperatures, in Ordered Intermetailics - Physical Metallurgy and Mechanical Behaviour, edited by Liu, C., Cahn, R., and Sauthoff, G., volume 213 of NATO ASI Series, pages 321334, Kluwer Academic Publishers, 1992.CrossRefGoogle Scholar

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