Investigation of the hot compression behavior of the Mg-9A1-1Zn alloy using EBSP analysis and a cellular automata simulation

摘要

In this paper, the flow behavior of the magnesium alloy AZ91 during hotcompression with dynamic recrystallization (DRX) is studied by the electronback-scattered diffraction pattern (EBSP) method and a two-dimensionalcellular automata (CA) simulation. The flow behavior characteristics of thealloy during compression are studied and analyzed in detail. The influence ofsecond phase particles on the accumulation of dislocation and the migration ofgrain boundaries during the compression process are taken into account in theCA model. The current CA simulation results agree well with the experimentaldata in terms of both flow stress and microstructure evolution, suggesting thatthe proposed CA model is a reliable numerical approach for studying the DRXprocess of the AZ91 alloy. The simulated results show that the average sizeof the recrystallized grains increases to a peak value and then slowly reducesto a steady value due to simultaneous multi-cycle recrystallization during hotcompression of the AZ91 alloy.