Abstract
Composites with a matrix from Mg12Li-xAl (x = 0, 3, 5) alloys reinforced by 10 vol.% of Saffil short fibres were deformed in compression at temperatures from room temperature up to 200 °C. Flow stresses increase with increasing Al content and decrease with increasing temperature. Deformation stress achieved its maximum value at low deformation steps then it decreased with the strain or exhibited a stationary value. Possible hardening and softening mechanisms are discussed.

Key words
composite, magnesium alloy, deformation behaviour, compression test, hardening, softening

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