Study of the structural and mechanical properties of Sn–8.6 wt.% Zn alloys using creep measurements

A binary Sn–8.6 wt.% Zn alloy and tertiary alloy containing Cu of different content from 0.5 to 2 wt.% were prepared from high purity elements. Addition of Zn decreased the crystallite size of Sn matrix while Cu increased it. The lattice strain of Sn decreased for both alloys. Different degrees of p...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2007-07, Vol.460, p.14-19
Main Authors: Abd El-Salam, F., Abd El-Khalek, A.M., Nada, R.H.
Format: Article
Language:English
Subjects:
Applied sciences
Creep
Creep parameters
Cu additions
Exact sciences and technology
Inhemogeneous composition
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Predeformation
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Summary:A binary Sn–8.6 wt.% Zn alloy and tertiary alloy containing Cu of different content from 0.5 to 2 wt.% were prepared from high purity elements. Addition of Zn decreased the crystallite size of Sn matrix while Cu increased it. The lattice strain of Sn decreased for both alloys. Different degrees of pretorsional deformation were given to samples tested by creep. Increasing twisting predeformation increased the stored energy and the creation of vacancies which facilitate cross-slip due to the elimination of jogs and softening of the sample dominates. The creep parameters n, β, έ s and the ratio γ were obtained. The irregular variations of the measured parameters involve repeated hardening and recovery states depending on the mode of interaction of Zn in SnZn alloy and Cu in SnZnCu alloy. The X-ray and DTA analysis support the variations of the creep parameters.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2007.01.034