Activation energy of the aluminium alloy Mg-3Al-1Zn in hot forming

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F09%3A00022050" target="_blank" >RIV/61989100:27360/09:00022050 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Activation energy of the aluminium alloy Mg-3Al-1Zn in hot forming
Original language description
Compression tests of specimens from the aluminium alloy Mg-3Al-1Zn (AZ31) at temperature T = 250 to 450 °C and strain rate gama=0.01 to 10 s-1 were performed. From the peaks of the obtained stress-strain curves, the values of the activation energy Q andother material constants, usable for the description of the maximum stress and the kinetics of the dynamic recrystallization in dependence on the Zener-Hollomon parameter Z were expressed numerically. The deformation behaviour and especially the shape ofthe stress-strain curves differ significantly at the low and high values of the parameter Z. The boundary between these areas was determined mathematically as Z = 2.9E+13 s-1. While the specified activation energy Q was for these both areas nearly identical (157 or 155 kJ/mol, respectively), the mathematical description of the coordinates of the stress peak is markedly different. The changes in the deformation behaviour consist in a strong effect of twinning in the initial stages of for
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JG - Metallurgy, metal materials
OECD FORD branch
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Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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