Publikace na Matematicko-fyzikální fakulta |
2011
Abstrakt
Mg-8Li alloy reinforced by 7 vol.% SiC particles was processed by a powder metallurgical method. Samples were deformed in tension and compression at temperatures from room temperature up to 300 degrees C.
The yield stress as well as the maximum stress decrease with increasing temperature. Decreasing stresses detected at temperatures higher than 150 degrees C indicate possible presence of recovery process/es.
Estimated activation enthalpy is close to the activation enthalpy for the grain boundary sliding. Strain rate sensitivity was estimated at elevated temperatures.
Enhanced plasticity was estimated at 300 degrees C. Light and scanning electron microscopy revealed the cavitations during the high temperature deformation.