Analysis of flow stress and deformation mechanism under hot working of ZK60 magnesium alloy by a new strain-dependent constitutive equation
作者： D. Ciccarelli , M. El Mehtedi , A. Jäger , S. Spigarelli
DOI: 10.1016/J.JPCS.2015.08.020
关键词:
摘要: Abstract The present study investigates the variation of flow stress and microstructural evolution with strain for ZK60 magnesium alloy. A new constitutive equation was used to model excellent results. This analysis studies carried out on strained samples revealed existence two different regimes. At temperatures above 300 °C, moderate grain growth intragranular dislocation activity. Yet, calculated value activation energy marked increase in equivalent fracture indicated boundary sliding as a dominant mechanism this regime rate temperature, motion playing an ancillary role. lower temperatures, deformation exclusively governed by motion, extensive occurrence dynamic recrystallization, which started at low strains, absence growth.
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