Damping in Incramute Materials


Hui, David and Kozik, Thomas J.


High damping manganese-copper alloys lose their high damping character after storage at room temperature by a process of strain aging. This strain aging is a result of solute segregation (C, Si) to, and pinning of, antiferromagnetic domain boundaries. It has been previously shown that the addition of erbium to Incramute will stabilize the high damping character and the effects of strain aging will be reduced. In this study room temperature aging was conducted on an erbium modified Incramute alloy which was commericially produced. Results of this study show that the high damping character of Incramute is only retained when the alloy is initially over-aged. Under-aged and peak-aged samples exhibit a loss in damping capacity which is believed to result from the strain aging effect. Erbium was present in the microstructure as oxides and it was apparent that the erbium was not as effective in preventing the room temperature strain aging.

Meeting Name

American Society of Mechanical Engineers, Petroleum Division (Publication) PD (1991, Houston, TX, USA)


Materials Science and Engineering

Document Type

Article - Conference proceedings

Document Version


File Type





© 1991 American Society of Mechanical Engineers (ASME), All rights reserved.

Publication Date

01 Jan 1991

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