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Dislocations in shock-loaded titanium diboride

Published online by Cambridge University Press:  31 January 2011

D. M. Vanderwalker  and
W. J. Croft
D. M. Vanderwalker
Affiliation:
Army Materials Technology Laboratory, Materials Characterization Division, Watertown, Massachusetts 02172
W. J. Croft
Affiliation:
Army Materials Technology Laboratory, Materials Characterization Division, Watertown, Massachusetts 02172
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Abstract

The structure of shock-loaded polycrystalline titanium diboride was examined with transmission electron microscopy. The shock wave from ballistic impact produces prismatic and basal slip in grains favorably oriented with respect to the shock wave. It can be deduced from annealing experiments with the formation of stacking fault hexagons that there is a high concentration of point defects in deformed regions from the motion of dislocation jogs. Weak-beam microscopy shows that the dislocations in TiB2 are dissociated into partial dislocations. The stacking fault energy measured from a screw dislocation in the basal plane was found to be 120 mJ/m2. Widely dissociated dislocations in the shocked sample suggest that residual stresses are present in some regions.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 4 , August 1988 , pp. 761 - 763
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

1Rice, M. H.McQueen, R. G. and Walsh, J. M.Solid State Phys. 6, 1 (1958).Google Scholar
2Davison, L. and Graham, R. A.Phys. Rep. 55, 255 (1977).CrossRefGoogle Scholar
3Meyers, M. A. and Murr, L. E. in Shock Waves and High Strain Rate Phenomena in Metals, edited by Meyers, M. A. and Murr, L. E. (Plenum, New York, 1981).CrossRefGoogle Scholar
4Smith, C. S.Trans. AIME 212, 574 (1958).Google Scholar
5Meyers, M. A.Scr. Metall. 12, 21 (1978).CrossRefGoogle Scholar
6Kressel, H. and Brown, W.J. Appl. Phys. 38, 1618 (1967).CrossRefGoogle Scholar
7Rose, M. F. and Berger, T. L.Philos. Mag. 17, 1121 (1968).CrossRefGoogle Scholar
8Lundstrom, T.Ark. Kemi. 31, 227 (1969).Google Scholar
9Thompson, R.Prog. Boron Chem. 2, 173 (1969).Google Scholar
10Hirth, J. P. and Lottie, J.Theory of Dislocations (Wiley, New York, 1982).Google Scholar
11Cockayne, D. J. H.J. Micros. 98, 116 (1973).CrossRefGoogle Scholar
12Cockayne, D. J. H.Hons, A. and Spence, J. C. H.Philos. Mag. 42, 773 (1980).CrossRefGoogle Scholar
13Cockayne, D. J. H.Ray, I. L. F. and Whelan, M. J.Philos. Mag. 20, 1265 (1969).CrossRefGoogle Scholar
14Balluffi, R. W. and Granato, A. V. in Dislocations in Solids, edited by Nabarro, F. R. N. (North-Holland, Amsterdam, 1979).Google Scholar
15Hirsch, P. B.Philos. Mag. 7, 67 (1962).CrossRefGoogle Scholar
16Silcox, J. and Hirsch, P. B.Philos. Mag. 4, 72 (1959).CrossRefGoogle Scholar
17Loretto, M. H. and Smallman, R. E.Defect Analysis in Electron Microscopy (Chapman and Hall, London, 1975).Google Scholar
18Schapink, F. W. and Jong, M. De, Acta Metall. 12, 756 (1964).Google Scholar
19Wessel, K. and Alexander, H.Philos. Mag. 35, 1523 (1977).CrossRefGoogle Scholar