Novel Findings on the Damping Capacity of Metallic Materials

A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 1733

Special Issue Editor


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Guest Editor
Mechanical Engineering Department (DEM), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
Interests: metamaterials; structural dynamics; damping capacity; solid mechanics; alloy processing; light-alloy metallurgy; alloy casting; additive manufacturing
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Special Issue Information

Dear Colleagues,

The analysis of damping capacity is one of the most relevant topics in current metallic materials research. While the dissipation of energy by internal friction is fundamental to mitigate vibration related issues in mechanical systems, high damping is not always desirable. An example is the current applications in energy harvest from low amplitude dynamic loads. These considerations reveal that the damping capacity of metallic materials ideally should be tailored to specific applications. Given the current advances on metallic material processing, it is fundamental to analyze their influence on their damping capacity. This Special Issue is devoted to the dissemination of these novel findings and topics include (but are not limited):

  • Damping capacity;
  • Dynamic mechanical analysis;
  • Alloy processing;
  • Alloy casting;
  • Chemical and physical melt treatment;
  • Metallurgy
  • Heat treatments;
  • Work hardening;
  • Additive manufacturing;
  • Metal matrix composites;
  • Cellular solids;
  • Dislocations.

Dr. Vitor Hugo Carneiro
Guest Editor

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Keywords

  • damping capacity
  • dislocations
  • alloy processing
  • vibration damping
  • metallurgy

Published Papers (1 paper)

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Research

11 pages, 2691 KiB  
Article
The Influence of Precipitation Hardening on the Damping Capacity in Al–Si–Mg Cast Components at Different Strain Amplitudes
by Vitor H. Carneiro, José Grilo, Delfim Soares, Isabel Duarte and Hélder Puga
Metals 2022, 12(5), 804; https://doi.org/10.3390/met12050804 - 6 May 2022
Viewed by 1353
Abstract
An A356 alloy is a classic casting light alloy, which is able to be processed into complex geometrical shapes with tailored static and dynamic mechanical properties. As a promising material to reduce fuel and energy consumption in future vehicle designs, there is an [...] Read more.
An A356 alloy is a classic casting light alloy, which is able to be processed into complex geometrical shapes with tailored static and dynamic mechanical properties. As a promising material to reduce fuel and energy consumption in future vehicle designs, there is an interest in understanding the impact of heat treatments on the damping capacity of this alloy. The Granato–Lücke theory is used to detail the forced vibration response in gravity cast A356. It is shown that a solution treatment enhances damping capacity in lower stress states (i.e., strain-independent regime) due to the increase in weak pinning length. However, in high-stress states (i.e., strain-dependent regime), peak-aged (T6) samples display higher damping capacity. This is proposed to be originated by releasing dislocations from weak pinning points, which start bowing in the precipitates that act as strong pinning points. Based on these results, it is shown for the first time that the selection of heat treatments to optimize damping in forced vibration is highly dependent on the expected stress–strain state and must be considered in the design of cast components. Full article
(This article belongs to the Special Issue Novel Findings on the Damping Capacity of Metallic Materials)
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