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Title: Stress-induced structural change during superplastic deformation of bulk Zr-based metallic glass
Authors: Guo, XL
Chan, KC 
Liu, L
Shan, DB
Guo, B
Keywords: Crystallization
Metallic glass
Stress state
Issue Date: 2009
Publisher: Elsevier
Source: Materials science and engineering. A, Structural materials : properties, microstructure and processing, 2009, v. 499, no. 1-2, p. 534-539 How to cite?
Journal: Materials science and engineering. A, Structural materials : properties, microstructure and processing 
Abstract: The stress distribution of Zr 41.2Ti 13.8Cu 12.5Ni 10Be 22.5 metallic glass subjected to uniaxial compression in the supercooled liquid region was examined. The FEM results indicate a triaxial compressive stress at the top surface and core regions, and a compress-tensile stress at the circumferential region. Microhardness and thermal properties of the three regions were analyzed. It was found that the circumferential region had less crystallization and smaller hardness value. In order to vary the stress state, a constraining aluminum ring was also applied to the BMG specimen for a compression test. The findings show that the crystallization behavior and stress states of the BMG with the aluminum ring are different from that without the ring. The stress-induced structural change of the BMG is analyzed in the paper in terms of the spheric stress and the effective strain.
ISSN: 0921-5093
EISSN: 1873-4936
DOI: 10.1016/j.msea.2008.09.009
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