Mechanisms of anelasticity in Fe-13Ga alloy

被引：27

作者：

Golovin, I. S. ^{[1
]}

Riviere, A. ^{[2
]}

机构：

[1] Natl Res Technol Univ MISiS, Dept Phys Mat Sci, Moscow 119049, Russia

[2] CNRS, UMR 6617, LMPM ENSMA, F-86961 Futuroscope, France

来源：

INTERMETALLICS | 2011年 / 19卷 / 04期

关键词：

Multiphase intermetallics; Internal friction; Defects: Point defects; Vacancies; Grain boundaries; FE-GA ALLOYS; SPECTROSCOPY;

D O I：

10.1016/j.intermet.2010.10.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermally activated frequency and temperature dependent anelastic effects in Fe-Ga alloys are practically not studied as yet in spite of the capacity of these alloys to dissipate energy of mechanical vibrations due to magneto-mechanical damping. In this paper we have studied iron-based composition with 13 at.% Ga. Several thermally activated peaks have been discovered and their activation parameters are evaluated by means of temperature and frequency dependent internal friction tests using free-decay and forced vibrations. Physical mechanisms are proposed for most of these peaks. In addition to thermally activated relaxation peaks, an irreversible internal friction peak is recorded due to structural transformation around 200 degrees C. This peak is frequency independent and is accompanied by inverted modulus behaviour. High damping capacity of Fe-13Ga alloy is confirmed. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：453 / 459

页数：7

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