SYMPOSIA PAPER Published: 01 January 1992

Characterization of the Damping Properties of High-Damping Alloys


Techniques and strategies to characterize the damping properties of high-damping metals from two of the major classes of damping mechanisms are described. Two types of high-damping metals were chosen for the study: a series of die cast zinc-aluminum alloys that exhibit predominantly amplitude-independent, thermally activated damping mechanisms and a manganese-copper (Mn-Cu)-based alloy casting that exhibits pronounced amplitude-dependent damping together with thermally activated damping. It is shown that the damping behavior of the zinc-aluminum alloys can be described semi-empirically over the ranges of temperature and frequency useful in practical applications. In contrast, a similar description of the damping behavior of the Mn-Cu alloy is not possible because of the change in amplitude-dependent damping with frequency and the variation of damping with microstructural changes from place to place in the casting.

Author Information

Ritchie, IG
AECL Research, Whiteshell Laboratories, Pinawa, Manitoba, Canada
Pan, Z-L
AECL Research, Whiteshell Laboratories, Pinawa, Manitoba, Canada
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Developed by Committee: E28
Pages: 142–157
DOI: 10.1520/STP17959S
ISBN-EB: 978-0-8031-5218-2
ISBN-13: 978-0-8031-1495-1