Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 785, Issue -, Pages 1257-1263Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.265
Keywords
Fe-Ga; Internal friction; Snoek and Zener peaks; Phase transition; Transient anelasticity
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Funding
- Ministry of Education and Science of the Russian Federation in the framework of increase Competitiveness Program of NUST MISIS
- Russian Foundation for Basic Research [18-58-53032]
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The paper studies amplitude-independent thermally-activated and transient effects in as-cast Fe-(8 -33)%Ga alloys in a temperature range from 0 to 600 degrees C and frequencies from 0.1 to 30 Hz using a dynamic mechanical analyser. The origin of the recorded anelastic effects is discussed based on both earlier publications and new, most systematic, data obtained in this paper. Activation energies and characteristic relaxation time are evaluated and analysed to conclude about the influence of Ga content on Zener relaxation, possible overlapping of Snoek-type relaxation with another, still not well defined, mechanism. The transient effect along with a sharp increase in the modulus is a sensitive tool to detect transition from metastable to stable structure in the Fe-Ga alloys. (C) 2019 Elsevier B.V. All rights reserved.
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