Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31450
Title: Thermoplastic gas pressure forming of bulk metallic glass sheets under biaxial tension
Authors: Gong, LD
Chan, KC 
Yu, P
Liu, L
Wang, G
Keywords: Bulging
Gas pressure forming
Metallic glasses
Thermoplasticity
Issue Date: 2009
Publisher: Elsevier
Source: Journal of alloys and compounds, 2009, v. 484, no. 1-2, p. 159-163 How to cite?
Journal: Journal of alloys and compounds 
Abstract: The deformation behaviour and structural evolution of bulk metallic glass sheets were studied under biaxial tension in supercooled liquid state. The sheets were gas pressure formed into hemispherical and semi-ellipsoid domes using dies with aspect ratios of 1:1 and 3:2, respectively, at the optimum temperature of 676 K. The structural evolution of the metallic glass sheets was examined after deformation. The stress distributions of the bulging sheets are calculated employing a finite element model. It was found that the stress state of biaxial tension accelerates nanocrystallization, which leads to an increase in the hardness of metallic glass. The gas pressure applied, bulging time, and temperature are the principal factors involved in the formation of products.
URI: http://hdl.handle.net/10397/31450
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2009.05.041
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