Abstract
The temperature dependence of the relative elongation of Mg8Li and Mg10Li alloys was measured in the temperature range from 20 up to 380 °C. The changes of the coefficient of thermal expansion, which was calculated from the temperature dependence of the relative elongation, were studied in dependence on the thermal cycles. The thermal strain in both Mg8Li and Mg10Li alloys leads to a drop of the thermal expansion coefficient in a certain temperature range. The influence of the thermal strain on the thermal expansion coefficient in Mg10Li was compared with this effect in Mg12Li-10 vol.% Safil fibres composite.

Key words
MgLi alloys, thermal strain, thermal expansion

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