Abstract
The dilatation characteristics of the pre-deformed AX41 magnesium alloy and AX41-12 vol.% Saffil fibre composite were determined in the temperature range of 20-380 °C. Two orientations of the fibres in the composites were investigated: with the planes of planar randomly fibres parallel and perpendicular to the longest axis of sample. During the first thermal cycle after compression deformation, the recovery of the alloy and composite occurred in two steps. We observed the recovery of twins at low temperatures, and the recovery of the dislocation slip at higher temperatures. The released plastic deformation was the largest in composites with the fibres perpendicular to the sample axis, and was the lowest for the alloy.

Key words
MMC, fibres, recovery, plastic deformation

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