Constitutive Models for the Description of Creep and Plasticity of Cast and Wrought Mg-Al and Mg-Zn Alloys
作者： Stefano Spigarelli , Mohamad El Mehtedi , A. Di Salvia
DOI: 10.1007/978-3-642-35167-9_29
关键词:
摘要: Investigations on the microstructural aspects of creep in Mg-Al alloys resulted development a constitutive model, describing strain rate dependence applied stress and temperature. The model was used to describe behaviour single-phase AZ31 alloy, as well more complex materials. These analyses demonstrated that hcp follows, general terms, same known scheme typical fcc Al-Mg alloys, also respect existence two regimes, first characterized by an \(n = 3\) exponent, second described modified form Garofalo equation. A low regime dominated grain boundary sliding observed fine-grained alloys. similar approach analyse plasticity Mg-Zn
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