Preliminary communication

Ultrasound influence on materials structure in parts reconditioned by welding with ultrasonic field

D. Dobrotă ; Engineering Faculty, University “Constantin Brancuşi” of Targu-Jiu, Romania
Gh. Amza ; Engineering and Tehnological Systems Management Faculty, Polytehnic University of Bucharest, Romania

Abstract

Research presented in the paper refers to the structural analysis of materials that are thermally influenced for loading by welding of pieces in the classical variant of manual coated electric arc welding and the version that in which the welding bath is activated by ultrasounds. The structural analysis made refer to: the size of the grains of the structure obtained under certain loading conditions through welding, grain size variation on the submission of a single layer in the ultrasonic field, the mode of solidification and fragmentation of grains when loaded in welding in a ultrasonic field, acceleration of the diffusion process for ultrasonic activation, the appearance of hard carbides between grains.

Keywords

structural analysis; loading by welding; manual welding; ultrasonic activation

Hrčak ID:

86773

URI

https://hrcak.srce.hr/86773

Publication date:

1.1.2013.

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