Publikace na Matematicko-fyzikální fakulta |
2015
Abstrakt
Temperature dependence of logarithmic decrement was measured in Mg-9Al-lZn alloy. The developed internal friction peak was found while heating in the vicinity of 320 degrees C.
Position and height of this peak in the temperature scale depends on the heating rate. Simultaneously microstructural observations were performed in the selected points of the temperature scale.
SEM revealed discontinuous precipitates at lower temperature which converted at higher temperatures into continuous precipitates. Possible internal friction mechanism is discussed.