TEM Characterization of Dynamic Recrystallization in TiB2 Particles after Hypervelocity Impact

DOI: 10.4236/mr.2014.23007   PDF   HTML   XML   2,966 Downloads   3,388 Views   Citations


Characteristic of dislocations and dynamic recrystallization in TiB2 particles associated with hypervelocity impact craters in 65 vol.% TiB2/Al composite were investigated by transmission electron microscopy (TEM). As high temperature due to hypervelocity impact can make the dislocation climb, a bunch of vacancies were generated and then gathered to form vacancy slice, finally formed dislocation rings. In addition, by climbing, edge dislocations rearranged themselves into wall vertical with slip plane, which finally forms sub grain boundary. Moreover, big angle grain boundaries were observed, which demonstrates that dynamic recrystal grains were formed in impacted TiB2 particles. As a result, deformation behavior of TiB2 particles in 65 vol.% TiB2/Al composite under hypervelocity impact includes generation of dislocation, slip and climb of dislocation, and dynamic recrystallization.

Share and Cite:

Guo, Q. , Li, J. , Hou, L. and Sun, D. (2014) TEM Characterization of Dynamic Recrystallization in TiB2 Particles after Hypervelocity Impact. Microscopy Research, 2, 51-55. doi: 10.4236/mr.2014.23007.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Chrstiansen, E.L., Crew, J.L. and Kerr, J.H. (1995) Hypervelocity Impact Testing above 10 km/s of Advanced Orbital Debris Shields. Shock Compression of Condensed Matter-1995, AIP Conference Proceedings, 1183-1186.
[2] Robinson, J.H. and Nolen, A.M. (1995) An Investigation of Metal Matrix Composites as Shields for Hypervelocity Orbital Debris Impacts. International Journal of Impact Engineering, 17, 685-697. http://dx.doi.org/10.1016/0734-743X(95)99891-T
[3] Li, H.T., Fei, W.D. and Yang, D.Z. (2002) Damage of Aluminum Borate Whisker Reinforced 6061 Aluminum Composite under Impact of Hypervelocity Projectiles. Materials Science and Engineering A, 333, 377-379. http://dx.doi.org/10.1016/S0921-5093(01)01862-7
[4] Sunwoo, A.J., Becker, R. and Goto, D.M. (2006) Adiabatic Shear Band Formation in Explosively Driven Fe-Ni-Co Alloy Cylinders. Scripta Materialia, 55, 247-250. http://dx.doi.org/10.1016/j.scriptamat.2006.04.010
[5] Rivas, J.M., Quinones, S.A. and Murr, L.E. (1995) Hypervelocity Impact Cratering: Microstructural Characterization. Scripta Metallurgica et Materialia, 33, 101-107. http://dx.doi.org/10.1016/0956-716X(95)00105-5
[6] Murr, L.E., Garcia, E.P. and Rims, J.M. (2006) Ballistic Penetration in Thick Copper Plates: Microstructural Characterization. Scripta Materialia, 37, 1329-1335. http://dx.doi.org/10.1016/S1359-6462(97)00267-4
[7] Zhen, L., Li, G.A. and Zhou, J.S. (2005) Micro-Damage Behaviors of Al-6Mg Alloy Impacted by Projectiles with Velocities of 1?3.2 km/s. Materials Science and Engineering A, 391, 354-366. http://dx.doi.org/10.1016/j.msea.2004.09.016
[8] Guo, Q., Sun, D.L. and Jiang, L.T. (2012) Residual Microstructure Associated with Impact Craters in TiB2/2024Al Composite. Micron, 43, 344-348. http://dx.doi.org/10.1016/j.micron.2011.09.011
[9] Guo, Q., Sun, D.L. and Jiang, L.T. (2012) Residual Microstructure and Damage Geometry Associated with High Speed Impact Crater in Al2O3 and TiB2 Particles Reinforced 2024 Al Composite. Materials Characterization, 66, 9-15. http://dx.doi.org/10.1016/j.matchar.2012.01.006
[10] Jiang, L.T. Patent of the People’s Republic of China: ZL 200710072590.9 (in Chinese).
[11] Meyers, M.A. (1978) A Mechanism for Dislocation Generation in Shock-Wave Deformation. Scripta Metallurgica, 12, 21-26. http://dx.doi.org/10.1016/0036-9748(78)90219-3
[12] Hoke, D.A. and Gray III, G.T. (1995). Arrangement of Dislocation Networks in Hot-Pressed Titanium Diboride. Scripta Metallurgica et Materialia, 33, 171-177. http://dx.doi.org/10.1016/0956-716X(95)00014-M

comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.