Thermo-mechanical treatment of extruded Mg-1Zn alloy: Cluster analysis of AE signals

0492070 - ÚJF 2019 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Dobroň, P. - Drozdenko, D. - Hegedüs, M. - Olejňák, J. - Fekete-Horváth, Klaudia - Bohlen, J.
Thermo-mechanical treatment of extruded Mg-1Zn alloy: Cluster analysis of AE signals.
Minerals, Metals and Materials Series. Vol. F7. Les Ulis: Springer, 2018, s. 217-221. ISBN 978-3-319-72331-0. ISSN 2367-1181.
[International Symposium on Magneisum Technology. Phoenix (US), 11.03.2018-15.03.2018]
Grant CEP: GA MŠMT EF16_013/0001794
Institucionální podpora: RVO:61389005
Klíčová slova: acoustic emission * annealing * cluster analysis * Magnesium * twinning
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

The proper thermo-mechanical treatment can improve mechanical properties of extruded Mg alloys through a solute segregation and precipitation along twin boundaries. The effect of heat treatment on mobility of twin boundaries with respect to applied loading direction was studied in extruded Mg–1Zn alloy using the acoustic emission (AE) technique. The adaptive sequential k-means clustering (ASKC) was applied to analyze the AE data in order to determine the dominant deformation mechanism in a given time period. The AE energy, median frequency and the number of elements in individual AE clusters are the main parameters of presented clustering analysis. Active deformation mechanisms are discussed with respect to mutual orientation of grains and loading direction.
Trvalý link: http://hdl.handle.net/11104/0285639