Title:
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Modeling of the Sub-Tg Relaxation Spectrum of Pd42.5Ni7.5Cu30P20 Metallic Glass
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Author:
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Liu, Chaoren; Pineda Soler, Eloi; Crespo Artiaga, Daniel; Qiao, Jichao
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
Abstract:
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In this work we study the mechanical relaxation spectrum of Pd42.5Ni7.5Cu30P20
metallic glass. The effect of aging on the relaxation behavior is analyzed by measuring the
internal friction during consecutive heating runs. The mechanical relaxation of the wellannealed
glass state is modeled by fitting susceptibility functions to the primary and
secondary relaxations of the system. The model is able to reproduce the mechanical
relaxation spectrum below the glass transition temperature (sub-Tg) in the frequency-
temperature ranges relevant for the high temperature physical properties and forming
ability of metallic glasses. The model reveals a relaxation spectrum composed by the
overlapping of primary and secondary processes covering a wide domain of times but with
a relatively narrow range of activation energies. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Spectrum analysis -Relaxation spectroscopy -Metallic glasses -Vidres metàl·lics |
Rights:
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http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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