Mechanical spectroscopy of nanocrystalline nickel near room temperature

J. Lohmiller; C. Eberl; R. Schwaiger; O. Kraft; T. J. Balk

doi:10.1016/j.scriptamat.2008.04.031

Mechanical spectroscopy of nanocrystalline nickel near room temperature

J. Lohmiller, C. Eberl, R. Schwaiger, O. Kraft, T. J. Balk

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12 Scopus citations

Abstract

In this study, the anelastic behavior of nanocrystalline nickel was investigated by mechanical spectroscopy. Test temperature ranged from room temperature to 415 K, and frequency from 235 to 2567 Hz, with two internal friction peaks observed. Peak temperature increased with increasing frequency, indicating a thermally activated damping process. The smaller peak yields an activation energy H = 0.70 eV. The peaks appear to be P_β and P_γ Hasiguti peaks, arising from damping due to dislocations and point defects.

Original language	English
Pages (from-to)	467-470
Number of pages	4
Journal	Scripta Materialia
Volume	59
Issue number	4
DOIs	https://doi.org/10.1016/j.scriptamat.2008.04.031
State	Published - Aug 2008

Keywords

Anelasticity
Damping
Internal friction
Nanocrystalline nickel

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2008.04.031

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title = "Mechanical spectroscopy of nanocrystalline nickel near room temperature",

abstract = "In this study, the anelastic behavior of nanocrystalline nickel was investigated by mechanical spectroscopy. Test temperature ranged from room temperature to 415 K, and frequency from 235 to 2567 Hz, with two internal friction peaks observed. Peak temperature increased with increasing frequency, indicating a thermally activated damping process. The smaller peak yields an activation energy H = 0.70 eV. The peaks appear to be Pβ and Pγ Hasiguti peaks, arising from damping due to dislocations and point defects.",

keywords = "Anelasticity, Damping, Internal friction, Nanocrystalline nickel",

author = "J. Lohmiller and C. Eberl and R. Schwaiger and O. Kraft and Balk, {T. J.}",

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T1 - Mechanical spectroscopy of nanocrystalline nickel near room temperature

AU - Lohmiller, J.

AU - Eberl, C.

AU - Schwaiger, R.

AU - Kraft, O.

AU - Balk, T. J.

PY - 2008/8

Y1 - 2008/8

N2 - In this study, the anelastic behavior of nanocrystalline nickel was investigated by mechanical spectroscopy. Test temperature ranged from room temperature to 415 K, and frequency from 235 to 2567 Hz, with two internal friction peaks observed. Peak temperature increased with increasing frequency, indicating a thermally activated damping process. The smaller peak yields an activation energy H = 0.70 eV. The peaks appear to be Pβ and Pγ Hasiguti peaks, arising from damping due to dislocations and point defects.

AB - In this study, the anelastic behavior of nanocrystalline nickel was investigated by mechanical spectroscopy. Test temperature ranged from room temperature to 415 K, and frequency from 235 to 2567 Hz, with two internal friction peaks observed. Peak temperature increased with increasing frequency, indicating a thermally activated damping process. The smaller peak yields an activation energy H = 0.70 eV. The peaks appear to be Pβ and Pγ Hasiguti peaks, arising from damping due to dislocations and point defects.

KW - Anelasticity

KW - Damping

KW - Internal friction

KW - Nanocrystalline nickel

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SP - 467

EP - 470

JO - Scripta Materialia

JF - Scripta Materialia

IS - 4

ER -

Mechanical spectroscopy of nanocrystalline nickel near room temperature

Abstract

Keywords

ASJC Scopus subject areas

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