Numerical analysis of micro-formability of Mg-based bulk metallic glass in supercooled liquid region

CORC > 金属研究所 > 中国科学院金属研究所

	Numerical analysis of micro-formability of Mg-based bulk metallic glass in supercooled liquid region
	M. Cheng ; S. H. Zhang
刊名	Computational Materials Science
	2007
卷号	39 期号:3 页码:718-722
关键词	bulk metallic glass finite element analysis microforming supercooled liquid region ni amorphous-alloys newtonian viscosity plastic-flow superplasticity deformation
ISSN号	0927-0256
中文摘要	Mg-Cu-Y bulk metallic glass (BMG) exhibits obvious glass transition behavior and develops a supercooled liquid state in a wide temperature range. In the present paper, the plastic micro-formability of an Mg60Cu30Y10 BMG in the temperature range near the glass transition temperature (T-g) is investigated by finite element analysis (FEA). The material model includes both Newtonian and non-Newtonian flow behaviors. Two kinds of micro-dies, square and V-shaped dies are modeled to analyze the effects of forming temperature, lubrication condition and surface feature scale. Geometrical transferability is used to represent the formed surface topology that includes maximum distance and area of material flow into a die groove. The results reveal that the micro-formability depends strongly on temperatures, but slightly on lubrication condition. Furthermore, they show different curves between square and V-shaped grooves when the micro-formability is investigated with variation of the width of groove. This indicates micro-formability of the material is due to its isotropy and homogeneity on the microscale and is not very sensitive to the feature size. (C) 2006 Elsevier B.V. All rights reserved.
原文出处	://WOS:000247056700030
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/33480]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	M. Cheng,S. H. Zhang. Numerical analysis of micro-formability of Mg-based bulk metallic glass in supercooled liquid region[J]. Computational Materials Science,2007,39(3):718-722.
APA	M. Cheng,&S. H. Zhang.(2007).Numerical analysis of micro-formability of Mg-based bulk metallic glass in supercooled liquid region.Computational Materials Science,39(3),718-722.
MLA	M. Cheng,et al."Numerical analysis of micro-formability of Mg-based bulk metallic glass in supercooled liquid region".Computational Materials Science 39.3(2007):718-722.