Article ID Journal Published Year Pages File Type
1503635 Scripta Materialia 2006 6 Pages PDF
Abstract

A Ni-added MnCuNiFe damping alloy is observed to show a smaller damping capacity degradation than other MnCu alloys during holding at room temperature. A step-increase mode of damping capacity appears in the MnCuNiFe alloy during holding at a higher temperature above Tt = 350 K, the phase transformation temperature of the alloy. The critical holding time corresponding to the onset of the step-increase mode of damping capacity has been related to the diffusion of carbon to the Mn sulfide precipitates in the alloy. Thermal cycling of the alloy to a lower temperature above the Tt may cause the formation of dislocations, which will decrease the damping capacity of the alloy, especially at high strain amplitudes above 1 × 10−5.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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