Cu-Zr非晶合金薄带的高温拉伸蠕变研究

doi:10.11896/j.issn.1005-023X.2018.24.018

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Abstract The typical Cu₅₀Zr₅₀ and Cu₆₀Zr₄₀ binary metallic glasses ribbons were taken as object of this study, the effects of stress and temperature on uniaxial tensile creep at temperature close to the T_g (glass transition temperature) were studied systematically via dynamic mechanical analyzer (DMA). The T_g was measured by differential scanning calorimeter (DSC) and DMA at the same heating rate, respectively. The apparent activation energies for the creep of Cu₅₀Zr₅₀ and Cu₆₀Zr₄₀ were obtained from Arrhenius equation, which were 5.3 eV and 6.2 eV, respectively. This indicates that the tensile creep deformation of Cu-Zr metallic glasses is related to the glass transition (α-relaxation) behavior. Further calculation showed that creep stress exponent (n) decreasesd with the increasing temperature and was finally close to 1, which demonstrated Cu₅₀Zr₅₀ and Cu₆₀Zr₄₀ metallic glasses tend to be Newtonian viscous flow when they approach to glass transition stage.

Key words： Cu-Zr metallic glass ribbons high temperature tensile creep activation energy stress exponent

Published: 23 January 2019

CLC number:

O075

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	Articles by authors
	HONG Kai
	WU Lin
	JIANG Wei
	WU Jili
	ZHANG Bo

Cite this article:

HONG Kai,WU Lin,JIANG Wei, et al. Tensile Creep Behaviors of Cu-Zr Metallic Glass Ribbons at High Temperature[J]. Materials Reports, 2018, 32(24): 4309-4313.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.24.018 OR http://www.mater-rep.com/EN/Y2018/V32/I24/4309

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