Viscoelastic Properties of Thixotropic Semisolid Alloy Relating the Microstructure

The subject of this work is to investigate viscoelastic properties such as loss modulus (G ́ ́), storage modulus (G ́), complex shear modulus (G*), complex viscosity (η*) and loss angle () at different temperatures by means of a small-amplitude oscillatory test. These properties allow to provide in...

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Published inSolid state phenomena Vol. 285; pp. 380 - 384
Main Authors Sanjuan-Sanjuan, Gerardo, Chavez-Castellanos, Ángel Enrique
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 03.01.2019
Subjects
Alloys
Semisolids
Viscoelasticity
Viscoelasticity
Thixotropy
Semisolid Alloy
Rheology
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Abstract The subject of this work is to investigate viscoelastic properties such as loss modulus (G ́ ́), storage modulus (G ́), complex shear modulus (G*), complex viscosity (η*) and loss angle () at different temperatures by means of a small-amplitude oscillatory test. These properties allow to provide information about materials structure. For this purpose, we employed a tin-lead alloy (Sn-15%Pb) which exhibits a similar microstructure to aluminum alloys and is the classic alloy for semisolid thixotropic studies. It is interesting to note that the Sn-15%Pb alloy exhibits a slightly decrease in storage modulus (G ́) over the entire frequency (0.01-10Hz) at high temperatures, showing its viscoelastic behavior. In addition, a detailed analysis of master curves (oscillatory tests) was made to relate the semisolid microstructure (solid fraction) with the plateau modulus (GN0) which is directly related with both molecular weight or percolation threshold in polymer and gels science respectively.
AbstractList The subject of this work is to investigate viscoelastic properties such as loss modulus (G ́ ́), storage modulus (G ́), complex shear modulus (G*), complex viscosity (η*) and loss angle () at different temperatures by means of a small-amplitude oscillatory test. These properties allow to provide information about materials structure. For this purpose, we employed a tin-lead alloy (Sn-15%Pb) which exhibits a similar microstructure to aluminum alloys and is the classic alloy for semisolid thixotropic studies. It is interesting to note that the Sn-15%Pb alloy exhibits a slightly decrease in storage modulus (G ́) over the entire frequency (0.01-10Hz) at high temperatures, showing its viscoelastic behavior. In addition, a detailed analysis of master curves (oscillatory tests) was made to relate the semisolid microstructure (solid fraction) with the plateau modulus (G N 0 ) which is directly related with both molecular weight or percolation threshold in polymer and gels science respectively.
The subject of this work is to investigate viscoelastic properties such as loss modulus (G ́ ́), storage modulus (G ́), complex shear modulus (G*), complex viscosity (η*) and loss angle () at different temperatures by means of a small-amplitude oscillatory test. These properties allow to provide information about materials structure. For this purpose, we employed a tin-lead alloy (Sn-15%Pb) which exhibits a similar microstructure to aluminum alloys and is the classic alloy for semisolid thixotropic studies. It is interesting to note that the Sn-15%Pb alloy exhibits a slightly decrease in storage modulus (G ́) over the entire frequency (0.01-10Hz) at high temperatures, showing its viscoelastic behavior. In addition, a detailed analysis of master curves (oscillatory tests) was made to relate the semisolid microstructure (solid fraction) with the plateau modulus (GN0) which is directly related with both molecular weight or percolation threshold in polymer and gels science respectively.
Author Sanjuan-Sanjuan, Gerardo
Chavez-Castellanos, Ángel Enrique
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  organization: Universidad Nacional Autonoma de Mexico : Departamento de Ingeniería Metalúrgica
– givenname: Ángel Enrique
  surname: Chavez-Castellanos
  fullname: Chavez-Castellanos, Ángel Enrique
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  organization: Universidad Nacional Autónoma de México : Departamento de Ingeniería Química, Facultad de Química
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10.1007/bf00540873
10.1007/bf02642580
10.1016/j.actamat.2010.10.059
10.1179/095066001225001076
10.1016/s0007-8506(07)62094-0
10.1002/9783527623969
10.1016/j.pmatsci.2004.04.003
10.1007/978-3-642-00706-4
10.1016/s0921-5093(03)00528-8
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Keywords Viscoelasticity
Thixotropy
Semisolid Alloy
Rheology
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SubjectTerms Alloys
Semisolids
Viscoelasticity
Title Viscoelastic Properties of Thixotropic Semisolid Alloy Relating the Microstructure
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