Publikace na Matematicko-fyzikální fakulta |
2011
Abstrakt
The deformation characteristics of the WE54 magnesium alloy reinforced by 13% of SiC particles have been investigated in tension at elevated temperatures. Composite material was prepared by powder metallurgy technique.
The strain rate sensitivity parameter m has been estimated by the abrupt strain rate changes (SRC) method. SRC tests and tensile tests with constant strain rate ((epsilon) over dot = const.) were performed at temperatures from 350 to 500 degrees C.
Increased ductility has been found at high strain rates. The corresponding in value was 0.3.
The activation energy Q has been estimated. Microstructure evolution has been observed by the light microscope and scanning electron microscope.