Mg-based bulk metallic glasses: Elastic properties and their correlations with toughness and glass transition temperature

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	Mg-based bulk metallic glasses: Elastic properties and their correlations with toughness and glass transition temperature
	S. G. Wang; L. L. Shi; J. Xu
	2011
发表期刊	Journal of Materials Research
ISSN	0884-2914
卷号	26 期号:7 页码:923-933
摘要	In this work, elastic properties of Mg-based bulk metallic glasses (BMGs) with different chemical compositions were investigated. By compositional tuning in the quaternary Mg-Cu-Ag-Y alloys, the Poisson's ratio nu of 0.332 is achieved at Mg(56)Cu(21)Ag(14)Y(9) BMG, in excess of the previously suggested critical value (nu = 0.31-0.32) for the brittle-to-tough transition in metallic glasses. With the properties of the constituent elements, the predicted values of the bulk modulus B and shear modulus mu of Mg-based BMGs are 8% and 10% greater than the measured value, respectively. Notch toughness K(Q) of the ten investigated Mg-based BMGs varies between 3.6 and 8.2 MPa root m. Intrinsic brittleness of Mg glass is associated with its tiny plastic zone size (in micrometer scale) and weak resistance to crack propagation. The toughness variations are lack of significant correlation with the m or l. Among the investigated alloys, the Mg(59.5)Cu(22.9)Ag(6.6)Gd(11) BMG manifests a good combination of improved toughness and high glass-forming ability.
部门归属	[wang, shao-gang; shi, ling-ling; xu, jian] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;xu, j (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china;jianxu@imr.ac.cn
关键词	Cu-y Fracture-toughness Structural Relaxation Forming Ability Plasticity Alloys Brittleness
URL	查看原文
WOS记录号	WOS:000292827800013
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30739
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. G. Wang,L. L. Shi,J. Xu. Mg-based bulk metallic glasses: Elastic properties and their correlations with toughness and glass transition temperature[J]. Journal of Materials Research,2011,26(7):923-933.
APA	S. G. Wang,L. L. Shi,&J. Xu.(2011).Mg-based bulk metallic glasses: Elastic properties and their correlations with toughness and glass transition temperature.Journal of Materials Research,26(7),923-933.
MLA	S. G. Wang,et al."Mg-based bulk metallic glasses: Elastic properties and their correlations with toughness and glass transition temperature".Journal of Materials Research 26.7(2011):923-933.