| Acoustic Emission Study of Active Deformation Mechanisms in Mg Alloys Patrik Dobron1; Daria Drozdenko2; Klaudia Horvath1; Juraj Olejnak1; Jan Bohlen3; 1CHARLES UNIVERSITY, PRAGUE, Prague, Czech Republic; 2MAGNESIUM RESEARCH CENTER, KUMAMOTO UNIVERSITY, Kumamoto, Japan; 3HELMHOLTZ-ZENTRUM GEESTHACHT, Geesthacht, Germany; PAPER: 319/Magnesium/Regular (Oral) SCHEDULED: 16:20/Fri. 25 Oct. 2019/Adonis ABSTRACT: The activity of individual deformation mechanisms during deformation tests of wrought Mg alloys was investigated using the acoustic emission (AE) technique. The investigated alloys exhibited a typical basal texture with basal planes oriented nearly parallel to the extrusion or rolling direction. Deformation tests were performed at room temperature and the obtained results are supported by microstructure evolution analysis provided by electron backscattered diffraction (EBSD). The AE signal analysis correlates the microstructure and the stress-strain curves to the active deformation mechanisms quite well. To determine the dominant deformation mechanism in a given time period, the adaptive sequential k-means (ASK) clustering was applied. X-ray diffraction was used to characterize the deformation texture before and after the test in order to obtain comprehensive data for texture characterization. |
