Invited Speakers

Tünde Anna KOVÁCS
Associate Professor PhD
Department of Materials Technology, Óbuda University, HUNGARY

Dr Kovács is an Associate Professor in the Department of Materials Technology of the Óbuda University, Hungary. Member of the editorial board of the Acta Materialia Transylvania. Co-author of 109 publications with around 150 citations. Her research interests are in the field of the materials science and technologies, special welding processes (ultrasonic and explosive welding) affected phase transformation of metals, and research interest of the impact load resistance composite materials.  

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THE MICROSTRUCTURE CHANGING AS A FUNCTION OF THE ELECTROACOUSTIC EFFECT UNDER ULTRASONIC WELDING PROCESS

The ultrasonic welding is a new useful joining technology. The physical base of this technology is the electroacoustic effect in the metal crystal structure. The ultrasound, high-frequency vibration transmit energy to the crystal structure. During ultrasonic welding, the metal effected by pressure caused plastic deformation, high-frequency vibration and the vibration amplitude limited friction. These effects establish a metallic joint between the metal sheets. Even that the friction and electroacoustic energy input result is dynamic recrystallization and under grains refinement a softening in the welded joint. The ultrasound effect in the microstructure as a function of the process parameters is not well understand and tested yet. In this research we can try to find some relationship between these parameters and the results microstructure and mechanical parameters of the welded joint.
To understand this process is very important one side understand the physical effects and another side to optimize the welding parameters for industrial application.

 

 

Firstname SURNAME
PhD
Senior Lecturer/Research Fellow
Affiliation 1 
Affiliation 1 

Short CV of the invited speaker 

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TITLE OF THE PRESENTATION 

Abstract of the presented research. 

 

Firstname SURNAME
PhD
Senior Lecturer/Research Fellow
Affiliation 1 
Affiliation 1 

Short CV of the invited speaker 

*
*     *
TITLE OF THE PRESENTATION 

Abstract of the presented research.