Low Temperature Physics: 44, 966 (2018); https://doi.org/10.1063/1.5052686
Fizika Nizkikh Temperatur: Volume 44, Number 9 (September 2018), p. 1233-1240    ( to contents , go back )

Amplitude-dependent internal friction in AZ31 alloy sheets submitted to accumulative roll bonding

Z. Trojanová, Z. Drozd, P. Lukáč, and P. Minárik

Faculty of Mathematics and Physics, Charles University, Prague, Ke Karlovu 3, 121 16 Praha 2, Czech Republic
E-mail: ztrojan@met.mff.cuni.cz

J. Džugan and K. Halmešová

Comtes FHT, Průmyslová 996, 334 41 Dobřany, Czech Republic

Received March 19, 2018, published online July 26, 2018

Abstract

Fine grained magnesium alloy AZ31 sheets were submitted to the accumulative roll bonding (ARB). After ARB, the microstructure of samples was refined, and the sheets exhibited pronounced texture. The amplitude-dependent internal friction (ADIF) was measured at room temperature. Microstructure changes as the increased dislocation density, grain size refinement, twins, and texture influenced the ADIF. A significant anisotropy of the properties was observed. Experimental results are discussed on the base of physical mechanisms responsible for internal friction.

Key words: magnesium alloy, accumulative roll bonding, internal friction, dislocations, twinning, texture.

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