Characterization of Deformation Mechanisms in Mg Alloys by Advanced Acoustic Emission Methods

0493523 - ÚJF 2019 RIV CH eng J - Článek v odborném periodiku
Čapek, J. - Knapek, Michal - Minařík, P. - Dittrich, J. - Máthis, K.
Characterization of Deformation Mechanisms in Mg Alloys by Advanced Acoustic Emission Methods.
Metals. Roč. 8, č. 8 (2018), č. článku 644. E-ISSN 2075-4701
Grant CEP: GA ČR GB14-36566G; GA MŠMT EF16_013/0001794
Institucionální podpora: RVO:61389005
Klíčová slova: acoustic emission * magnesium alloys * twinning * dislocation slip * ASK analysis * EBSD
Obor OECD: Materials engineering
Impakt faktor: 2.259, rok: 2018

Adaptive sequential k-means (ASK) analysis of acoustic emission (AE) data was used to analyze the sources of AE during compression of three AZ31 magnesium samples with different initial texture. The results were compared to the classical hit-based approach. Observation of the deformed microstructure shows that the ASK analysis can distinguish very well between the signal originating in deformation twinning and dislocation slip. Moreover, together with microstructural analysis, the ASK algorithm revealed another source of AE for one of the samples, which was shown to be the double twinning.
Trvalý link: http://hdl.handle.net/11104/0286874