Mechanisms of anelasticity in Fe-Ge-based alloys

Golovin, I.S. and Neuhäuser, H. and Redfern, S. A. T. and Sinning, H.-R. (2009) Mechanisms of anelasticity in Fe-Ge-based alloys. Materials Science and Engineering: A, 521-52. pp. 55-58. DOI 10.1016/j.msea.2008.09.099

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Abstract

Internal friction (IF) effects in a series of Fe-Ge-C alloys with 3-27 at.%Ge and about 0.01-0.04 at.%C have been examined and are related to possible mechanisms of anelasticity according to the different alloy structures. While Fe-3 at.%Ge and Fe-12 at.%Ge are bcc and show distinct Snoek-type relaxation, this relaxation is absent in Fe-27 at.%Ge with hexagonal structure. Here a pronounced Zener relaxation at elevated temperatures is observed. The mixed structures (bcc + hexagonal) of Fe-19-21 at.%Ge give rise to a non-thermally activated peak which already appears in Fe-12 at%Ge and may be due to ordering and/or vacancy complexes. In the temperature range below room temperature two neighbouring peaks are detected in the bcc structures which are supposed to be related to dislocations.

Item Type:	Article
Uncontrolled Keywords:	09AREP; IA58;
Subjects:	03 - Mineral Sciences
Divisions:	03 - Mineral Sciences
Journal or Publication Title:	Materials Science and Engineering: A
Volume:	521-52
Page Range:	pp. 55-58
Identification Number:	10.1016/j.msea.2008.09.099
Depositing User:	Sarah Humbert
Date Deposited:	04 Jun 2009 07:39
Last Modified:	23 Jul 2013 09:55
URI:	http://eprints.esc.cam.ac.uk/id/eprint/1065

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