Journal Title Materials Engineering - Materiálové in?inierstvo (MEMI) Journal Abbreviation Mateng Publisher Group The University of Žilina Website http://ojs.mateng.sk

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Title	HIGH STRAIN RATE BEHAVIOUR OF AN AZ31 + 0.5 Ca MAGNESIUM ALLOY
Authors	Podrábský, Tomáš; Peši�ka, Josef; Luká�, Pavel; Trojanová, Zuzanka
Abstract	The paper reports behaviour of magnesium alloy AZ31 (nominal composition 3 % Al - 1 % Zn – balance Mg) with an addition of 0.5 wt. % Ca at high strain rates. Samples were prepared by the squeeze cast technology. Dynamic compression Hopkinson tests were performed at room temperature with impact velocities ranging from 11.2 to 21.9 m.s-1. A rapid increase of the flow stress and the strain rate sensitivity was observed at high strain rates. Transmission electron microscopy showed extremely high dislocation density and mechanical twins of two types. Adiabatic shear banding is discussed as the reason for the observed behaviour at high strain rates.
Publisher
Date	2011-11-27
Source
Rights	http://creativecommons.org/licenses/by-nc-nd/3.0/

 

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