Cooling rate effect on Young's modulus and hardness of a Zr-based metallic glass

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	Cooling rate effect on Young's modulus and hardness of a Zr-based metallic glass
	Liu, Z. Y. ; Yang, Y. ; Guo, S. ; Liu, X. J. ; Lu, J. ; Liu, Y. H. ; Liu, C. T. ; Liu XJ(刘兴军)
刊名	http://dx.doi.org/10.1016/j.jallcom.2010.12.095
	2011-02
关键词	Cooling rate effect on Young's modulus and hardness of a Zr-based metallic glass
英文摘要	t is known that cooling rate can affect the atomic structure and thus may possibly affect the mechanical properties of metallic glasses (MGs). In spite of the considerable efforts on the cooling rate, its effect on the mechanical properties is controversial at the present time. In this study, we present a micromechanical study of the cooling-rate effect on Young's moduli and hardness of the cast bulks and melt-spun ribbons for a Zr(55)Pd(10)Cu(20)Ni(5)Al(10) metallic glass. Using the classic nanoindentation method, the Young's moduli of the ribbon samples obtained at higher cooling rates were measured which appeared to be much lower than those of the bulk samples. However, through further experiments on slice samples cut from the as-cast bulks and finite-element (FE) analyses, we have clearly demonstrated that the measured difference in elastic moduli was mainly caused by the sample thickness effect in nanoindentation tests. To overcome such a confounding effect, microcompression experiments were performed on the as-cast and as-spun MG samples, respectively. Being consistent with the findings from nanoindentation, the microcompression results showed that the cooling rate, as ranging from similar to 10(2) to similar to 10(6) K/s, essentially has no influence on the Young's modulus and hardness of the metallic glasses. (C) 2010 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/59170]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Liu, Z. Y.,Yang, Y.,Guo, S.,et al. Cooling rate effect on Young's modulus and hardness of a Zr-based metallic glass[J]. http://dx.doi.org/10.1016/j.jallcom.2010.12.095,2011.
APA	Liu, Z. Y..,Yang, Y..,Guo, S..,Liu, X. J..,Lu, J..,...&刘兴军.(2011).Cooling rate effect on Young's modulus and hardness of a Zr-based metallic glass.http://dx.doi.org/10.1016/j.jallcom.2010.12.095.
MLA	Liu, Z. Y.,et al."Cooling rate effect on Young's modulus and hardness of a Zr-based metallic glass".http://dx.doi.org/10.1016/j.jallcom.2010.12.095 (2011).