Damping properties of steel compounds

Lasse Lamula, Kari Saarinen, Tomi Lindroos, Marke Kallio

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)


    Vibration damping is usually divided in five different damping mechanisms. They include internal material damping, interface damping (friction damping), radiation damping, energy losses occurring as a result of reflection at discontinuities of structures, and viscous damping caused by viscoelastic material or by surrounding fluid. Internal friction of metals is due to the internal mismatch in the material microstructure. In most of the cases mechanisms related to internal friction have negligibly small effect on the total damping capacity of the structure. Some metal alloys exhibit exceptionally high inherent damping capacity. The mechanisms influencing the damping properties of the high damping metals (HIDAMETs) can be categorized to four types of basic mechanisms: multiphase structure, ferromagnetism, dislocation damping and the damping due to movable twin boundaries. This paper deals with the internal damping of homogeneous materials due to the magnetomechanical damping of ferromagnetic material and the energy losses occurring at the interfaces of multilayer materials. The damping properties of a normal structural steel, Fe-Cr based HIDAMET and the combinations of these materials are studied. Typical applications of these types of materials may require strength, stiffness or wear resistance and hostile operating conditions combined with good damping properties. Traditional measuring methods are used for the determination of the damping coefficients. The measured damping values consists of internal material damping, radiation damping, viscous damping caused by the surrounding air and specimen mounting. The damping properties of the multilayer materials based on HIDAMETs are compared to the traditional damping treatments. Basic equations given in the literature are verified using experimental results of multilayer materials. The stiffness of multilayer structures is also studied. HIDAMETs offer an alternative for controlling the damping properties especially in harsh environments when wide temperature range is needed.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publication12th International Congress on Sound and Vibration 2005 (ICSV 12)
    PublisherInternational Institute of Acoustics and Vibration (IIAV)
    ISBN (Print)978-1-62748-149-6
    Publication statusPublished - 2005
    MoE publication typeA4 Article in a conference publication
    Event12th International Congress on Sound and Vibration 2005, ICSV 12 - Lisbon, Portugal
    Duration: 11 Jul 200514 Jul 2005


    Conference12th International Congress on Sound and Vibration 2005, ICSV 12
    Abbreviated titleICSV 12


    • vibration damping
    • high damping metal
    • magnetomechanical damping


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