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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Z. Y. Liu
  • S. Guo
  • X. J. Liu
  • Y. H. Liu

Detail(s)

Original languageEnglish
Pages (from-to)3269-3273
Journal / PublicationJournal of Alloys and Compounds
Volume509
Issue number7
Publication statusPublished - 17 Feb 2011
Externally publishedYes

Abstract

It 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 Zr55Pd 10Cu20Ni5Al10 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 ∼102 to ∼106 K/s, essentially has no influence on the Young's modulus and hardness of the metallic glasses. © 2010 Elsevier B.V. All rights reserved.

Research Area(s)

  • Cooling rate, Hardness, Metallic glass, Young's modulus

Citation Format(s)

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.

In: Journal of Alloys and Compounds, Vol. 509, No. 7, 17.02.2011, p. 3269-3273.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review