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Supersonic defects have the right stuff
Computer simulations indicate that defects can spread through a metal faster than the speed of sound.
References:
Gumbsch, P., and H. Gao. 1999. Dislocations faster than the speed of sound. Science 283(Feb. 12):965.
Further Readings:
Lund, F. 1998. Sound and fracture. Science 279(March 13):1652.
Marder, M., and J. Fineberg. 1996. How things break. Physics Today 49(September):24.
Sources:
Huajian Gao
Stanford University
Mechanical Engineering Department
Mechanics and Computation Division
Stanford, CA 94305-4040
Web site: http://www-am.stanford.edu/GaoGroup/
Peter Gumbsch
Max-Planck-Institut für Metallforschung
Seestr. 92
D-70174 Stuttgart
Germany
Web site: http://finix.mpi-stuttgart.mpg.de/~gumbsch/welcome-e.html
Michael P. Marder
University of Texas, Austin
Non-Linear Dynam, Ctr.
Campus Mail Code C1610
Austin, TX 78712
Web site: http://chaos.ph.utexas.edu/~marder/home.html
From Science News, Vol. 155, No. 7, February 13, 1999, p. 102. Copyright © 1999, Science Service.
