Influence of the Microstructure on the Damping Properties of Stress-Strain Tool Systems in the Processing of Welded Structures from Dissimilar Steels

Abstract:

Currently, welded heterogeneous structures are widely used in mechanical engineering. The mechanical processing of such complex products is accompanied by a self-oscillating process. For reducing the intensity of vibration, boring bar with an adjustable stress-strain state has to be used. Studies that were carried out by authors made possible to establish the influence of the microstructure of steels after heat treatment and in various stress states on the damping capacity. Εstablished influence allowed to select steel for the manufacture of a boring bar, in the inner cavity of which an expanding cone was installed for creating of a stress-strain state. Subsequent investigations as well made possible to establish the influence of the microstructure and the stress-strain state of the boring bar on the dynamic characteristics of the boring process of the welded structure. Such an approach enables preliminarily estimating the level of vibration amplitude while boring a heterogeneous welded structure, and to provide the specified parameters for the surface roughness of a precision product at the manufacturing stage.

• Periodical: Materials Science Forum (Volume 1022)
• Pages: 7-16
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1022.7
• Online since: February 2021
• Authors: Vyacheslav V. Maksarov*, Alexander E. Efimov, Aleksandr I. Keksin
• Keywords: Damping Properties, Dynamic Parameter, Mechanical Properties, Microstructure, Physical Properties, Self-Oscillating Process, Surface Roughnesses

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