physica status solidi (a)

Cover image for Vol. 213 Issue 12

Editor: Stefan Hildebrandt (Editor-in-Chief), Sabine Bahrs (Deputy Editor)

Online ISSN: 1862-6319

Associated Title(s): physica status solidi (b), physica status solidi (c), physica status solidi (RRL) - Rapid Research Letters

207_03c/2010Back Cover (Phys. Status Solidi A 3/2010)

Thermal stress at the interface of a fiber reinforced magnesium matrix composite arises when temperature changes. Relaxation of these stresses mainly occurs by the motion of dislocations, which produces a transient increase of the damping. Mechanical spectroscopy gives access to the dynamic modulus and to damping capacity measured by the phase lag tan(&thetas;) between the excitation and the response of the sample. An anomalous behavior of the dynamic modulus, which increases upon heating, is observed. The article by Chowdhury et al. (see pp. 713–717) explains this phenomenon by the competition between bonding and debonding of fibers to the matrix created by the motion of dislocations together with differential thermal expansion

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