Abstract
The effects of the size and shape of tungsten particles on dynamic torsional properties in tungsten heavy alloys were investigated. Dynamic torsional tests were conducted on seven tungsten alloy specimens, four of which were fabricated by repeated sintering, using a torsional Kolsky bar, and then the test results were comparedvia microstructure, mechanical properties, adiabatic shear banding, and deformation and fracture mode. The size of tungsten particles and their hardness were increased with the increasing of the sintering temperature and time, thereby deteriorating the fracture toughness. The dynamic torsional test results indicated that a cleavage fracture occurred predominantly with little shear deformation in the specimens whose tungsten particles were coarse and irregularly shaped whereas shear deformation was concentrated into the center of the gage section in the conventionally fabricated specimens. The deformation and fracture behavior of the specimens having coarse tungsten particles correlated well with the observation of thein situ fracture test results,i.e., cleavage crack initiation and propagation. These findings suggested that there would be an appropriate tungsten particle size condition in the penetration performance since the cleavage fracture mode would be beneficial for the self-sharpening of tungsten heavy alloys.
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W. J. Bruchey, E. J. Horwath and P. W. Kingman, inTungsten and Tungsten Heavy Alloys-Recent Advances (eds., A. Crowson and E.S. Chen), p. 121, TMS, Warrendale, PA (1991).
A. Bose, H. Couque and J. Lankford, Jr.,Int. J. Powder Metall. 28, 383 (1992).
S. P. Andrew, R. D. Caligiuru and L.E. Eiselstein, inTungsten and Tungsten Alloys-Recent Advances (eds., A. Crowson and E.S. Chen), p. 141, TMS, Warrendale, PA (1991).
K. T. Ramesh and R. S. Coates,Metall. Trans. 23A, 2625 (1992).
R. L. Woodward, N. J. Baldwin, I. Burch and B. J. Baxter,Metall. Trans. 16A, 2031 (1985).
R. H. Tham and H. Nähme, inTungsten and Tungsten Alloys-1992 (eds., A. Bose and R.J. Dowding), p. 335, MPIF, Princeton, NJ (1992).
M. Zhou, R. J. Clifton and A. Needleman, inTungsten and Tungsten Alloys-1992 (eds., A. Bose and R. J. Dowding), p. 343, MPIF, Princeton, NJ (1992).
S. Yadav and K. T. Ramesh, inTungsten and Refractory Metals-1994 (eds., A. Bose and R. J. Dowding), p. 411, MPIF, Princeton, NJ (1994).
W. Leonard, L. S. Magness, R. J. Dowding, J. Trogolo, M. Chung and D. Kapoor, inTungsten and Refractory Metals 3-1995 (eds., A. Bose and R.J. Dowding), p. 103, MPIF, Princeton, NJ (1995).
L. S. Magness, inTungsten and Refractory Metals 3-1995 (eds., A. Bose and R. J. Dowding), p. 133, MPIF, Princeton, NJ (1995).
J. Lankford, A. Bose and H. Couque, inHigh Strain Rate Behavior of Refractory Metals and Alloys (eds., R. Asfahani, E. Chen, and A. Crowson), p. 267, TMS, Warrendale, PA (1992).
W. E. Gurwell, inTungsten and Refractory Metals-1994 (eds., A. Bose and R. J. Dowding), p. 65, MPIF, Princeton, NJ (1994).
D. Chaiat, E. Y. Gutmanas and I. Gotman, inTungsten and Refractory Metals-1994 (eds., A. Bose and R.J. Dowding), p. 57, MPIF, Princeton, NJ (1994).
H.-S. Song, J.-W. Noh, W.-H. Baek, S.-J. L. Kang and B.-S. Chun,Metall. Trans. 28A, 485 (1997).
K. A. Hartley, J. Duffy and R. H. Hawley, inMetals Handbook, 9th ed., vol. 8, p. 218, ASM, Metals Park, OH (1985).
K. Cho, Y. C. Chi and J. Duffy,Metall. Trans. 21A, 1161 (1990).
A. Molinariand R. J. Clifton,J. Appl. Mech. ASME,54, 806 (1987).
L. S. Costin, E. E. Crisman, R. H. Hawley and J. Duffy, in2nd Conf. on Mechanical Properties of Materials at High Rates of Strain (ed., J. Harding), p. 90, The Institute of Physics, London (1979).
InMetals Handbook, 9th ed., vol. 9, p. 440, ASM, Metals Park, OH (1985).
S. Lee, K.-S. Sohn, I. Park and K. Cho,Metall. Mater. 1, 37 (1995).
InASTM Standard Method of Test for Plane-Strain Fracture Toughness of Metallic Materials, ASTM E399-74, 1974 Annual Book of ASTM Standard, p. 432, ASTM, Philadelphia, PA (1974).
M. Mitkov and W.A. Kaysser,Science of Sintering (eds., D. P. Uskokovi, H. Palmour and R. M. Spriggs), p. 243, Plenum Press, NY (1984).
A. S. Tetelman,Fracture of Solids (eds., D. C. Druckers and J. J. Gilman), p. 631, John Wiley & Sons, NY (1963).
R. Ayres and D. F. Stein,Acta metall. 19, 789 (1971).
A. Bose, H. Couque and J. Lankford, Jr., inTungsten and Tungsten Alloys-1992 (eds., A. Bose and R.J. Dowding), p. 291, MPIF, Princeton, NJ (1992).
T. Weerasooriya, P. Moy and R. J. Dowding, inTungsten and Refractory Metals-1994 (eds., A. Bose and R.J. Dowding), p. 401, MPIF, Princeton, NJ (1994).
K.-S. Churn, J.-W. Noh, H.-S. Song, E.-P. Kim, S. Lee and W.-H. Baek, inTungsten and Tungsten Alloys-1992 (eds., A. Bose and R.J. Dowding), p. 397, MPIF, Princeton, NJ (1992).
J.-W. Noh, E.-P. Kim, H.-S. Song, W.-H. Baek, K.-S. Churn and S-J.L. Kang,Metall. Trans. 24A, 2411 (1993).
A. H. Cottrell,Trans. Am. Inst. Min. Eng. 212, 192 (1958).
A. Marchand and J. Duffy,J. Mech. Phys. Solids 36, 261 (1988).
D.-K. Kim, S. Lee, and H.-S. Song,Metall. Trans. 29A, 1057 (1998).
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Kim, DK., Lee, S. & Song, HS. Effect of size and shape of tungsten particles on penetration performance in tungsten heavy alloys. Metals and Materials 5, 211–223 (1999). https://doi.org/10.1007/BF03026055
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DOI: https://doi.org/10.1007/BF03026055