Effect of Structural Relaxation on Deformation Behaviour of Zr-Based

Chin. Phys. Lett.

2006, Vol. 23

Issue (7): 1868-1871 DOI:

Original Articles

Effect of Structural Relaxation on Deformation Behaviour of Zr-Based

LIU Yuan¹;ZHANG Tai-Hua²;WEI Bing-Chen¹;XING Dong-Mei²;LI Wei-Huo¹;ZHANG Ling-Chen¹

¹National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080 ²State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080

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LIU Yuan, ZHANG Tai-Hua, WEI Bing-Chen et al 2006 Chin. Phys. Lett. 23 1868-1871

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Abstract Structural relaxation through isothermal annealing at temperature below glass transition is conducted on Zr_46.75Ti_8.25Cu_7.5Ni₁₀Be_27.5 (Vitreloy-4) bulk metallic glass. Defect concentration is correlated with the annealing time t according to differential scanning calorimetry thermalgrams. The effects of structural relaxation on mechanical properties and deformation behaviour are investigated by using instrumented nanoindentation. It is found that the as-cast alloy exhibits pronounced serration flow during the loading process of nanoindentation, and the size and number of the serrations decrease with the annealing time. The change of the deformation behaviour with structural relaxation is explained using a free volume model.

Keywords: 61.43.Dq 61.20.Lc 62.20.Fe

Published: 01 July 2006

PACS:	61.43.Dq	(Amorphous semiconductors, metals, and alloys)
	61.20.Lc	(Time-dependent properties; relaxation)
	62.20.Fe

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2006/V23/I7/01868

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	LIU Yuan
	ZHANG Tai-Hua
	WEI Bing-Chen
	XING Dong-Mei
	LI Wei-Huo
	ZHANG Ling-Chen

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