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Superplastic Behaviour of an Extruded AZ91 Alloy

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Trojanová Z., Turba K., Száraz Z., Ryspaev T., Palček P., Chalupová M.
Acta Physica Polonica A
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2012
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vol. 122
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issue 3
597-600
EN
Plastic deformation of extruded AZ91 magnesium alloy was investigated at various strain rates and in a temperature range of 360-420°C. Samples exhibiting superplastic behaviour were prepared with different thermo-mechanical treatments. Microstructure of samples was observed by light and scanning electron microscopy. The strain rate sensitivity parameter m has been estimated by the abrupt strain rate change method. Possible physical mechanisms of the superplastic flow are discussed.
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