ELFT HÍRADÓ

["Nguyen Quang Chinh" <chinh AT metal.elte.hu>]

               ELTE Fizikai Intézet, Anyagfizikai Tanszék,

                         TANSZÉKI SZEMINÁRIUM

                 2012. december 11., kedd, 8:30-kor
           ELTE Pázmány Péter sétány 1/A alatti épületében,
                      4.52 (Sas Elemér) teremben

                       Előadó: Prof. František Chmelík
  (Department of Physics of Materials, Faculty of Mathematics and Physics,
                       Charles University, Prague)


        „Exploring plastic deformation of magnesium based materials
                     by the acoustic emission technique”


     Abstract: 
  
     In determination of direct correlation between material properties and
parameters of testing environment, the non-destructive in-situ methods play an
important role. Among the tools emerging in the last decades, the acoustic
emission (AE) technique belongs to the most powerful and reliable ones.
     AE, which stems from transient elastic waves, generated within a material
due to sudden localized and irreversible structure changes, responds to
dislocation motion and twinning and therefore yields information on the
dynamic processes involved in plastic deformation of magnesium based
materials. Numerous studies have found a distinct correlation of the AE
activity with solute alloying, microstructure (texture, grain size, phase
composition), temperature, strain rate and the mode of testing (tension,
compression). The talk will address the following highlights:

1. Presenting results of AE measurements in various magnesium based materials 
2. Discussing the influence of the microstructure and testing parameters on
the AE response (e.g. texture, grain size, solute alloying, testing
temperature, loading mode)
3. Pointing out general aspects of the correlation between the AE response and
the micromechanisms of plastic deformation.




                     Minden érdeklődőt szívesen várunk.