Mechanisms of anelasticity in Fe-Ge-based alloys

I. S. Golovin; H. Neuhäuser; S. A.T. Redfern; H. R. Sinning

doi:10.1016/j.msea.2008.09.099

Mechanisms of anelasticity in Fe-Ge-based alloys

I. S. Golovin^*, H. Neuhäuser, S. A.T. Redfern, H. R. Sinning

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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.

Original language	English
Pages (from-to)	55-58
Number of pages	4
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	521-522
DOIs	https://doi.org/10.1016/j.msea.2008.09.099
Publication status	Published - Sept 15 2009
Externally published	Yes

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Keywords

Fe-Ge alloys
Internal friction
Snoek effect
Zener effect

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10.1016/j.msea.2008.09.099

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title = "Mechanisms of anelasticity in Fe-Ge-based alloys",

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.",

keywords = "Fe-Ge alloys, Internal friction, Snoek effect, Zener effect",

author = "Golovin, {I. S.} and H. Neuh{\"a}user and Redfern, {S. A.T.} and Sinning, {H. R.}",

year = "2009",

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doi = "10.1016/j.msea.2008.09.099",

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journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

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T1 - Mechanisms of anelasticity in Fe-Ge-based alloys

AU - Golovin, I. S.

AU - Neuhäuser, H.

AU - Redfern, S. A.T.

AU - Sinning, H. R.

PY - 2009/9/15

Y1 - 2009/9/15

N2 - 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.

AB - 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.

KW - Fe-Ge alloys

KW - Internal friction

KW - Snoek effect

KW - Zener effect

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DO - 10.1016/j.msea.2008.09.099

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JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

ER -

Mechanisms of anelasticity in Fe-Ge-based alloys

Abstract

ASJC Scopus Subject Areas

Keywords

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