Phase-separated microstructures and shear-banding behavior in a designed Zr-based glass-forming alloy

X.H. Du; J.C. Huang; H.M. Chen; H.S. Chou; Y.H. Lai; K.C. Hsieh; J.S.C. Jang; P.K. Liaw

doi:10.1016/j.intermet.2009.01.019

Author(s)

X.H. Du
H.M. Chen
H.S. Chou
Y.H. Lai
K.C. Hsieh
J.S.C. Jang
P.K. Liaw

Detail(s)

Original language	English
Pages (from-to)	607-613
Journal / Publication	Intermetallics
Volume	17
Issue number	8
Online published	28 Feb 2009
Publication status	Published - Aug 2009
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.intermet.2009.01.019 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-64449085217&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(fc338542-d877-4302-822e-06671a717714).html

Abstract

We have employed a thermodynamic-computation approach to identify the composition of the Zr-Cu-Ni-Al alloy system exhibiting a two-liquid miscibility phase equilibrium in the liquid-temperature region, which tends to favor the occurrence of the liquid-phase separation. Guided by these calculated diagrams, a Zr-based alloy with a 10 at.% Al is designed, and its bulk-metallic glass (BMG) is prepared successfully by the copper-mould suction casting. A heterogeneous microstructure characterized by the existence of phase-separated regions with several to decades micrometers in size forms in the BMG. Under uniaxial compressive loading, the designed Zr-based BMG demonstrates the continuous "work hardening" and remarkable macroscopic plastic strain at room temperature. The improvement of mechanical properties is attributed to the unique glassy structure correlated with both the heterogeneous microstructure and the micro-scaled phase separation, leading to the extensive shear-band formation, interaction, and multiplication.

Research Area(s)

B. Glasses, metallic, B. Mechanical properties at ambient temperature, E. Phase diagram, prediction, F. Electron microscopy, transmission

Citation Format(s)

[ RIS ] [ BibTeX ]

Phase-separated microstructures and shear-banding behavior in a designed Zr-based glass-forming alloy. / Du, X.H.; Huang, J.C.; Chen, H.M.; Chou, H.S.; Lai, Y.H.; Hsieh, K.C.; Jang, J.S.C.; Liaw, P.K.

In: Intermetallics, Vol. 17, No. 8, 08.2009, p. 607-613.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Du, XH, Huang, JC, Chen, HM, Chou, HS, Lai, YH, Hsieh, KC, Jang, JSC & Liaw, PK 2009, 'Phase-separated microstructures and shear-banding behavior in a designed Zr-based glass-forming alloy', Intermetallics, vol. 17, no. 8, pp. 607-613. https://doi.org/10.1016/j.intermet.2009.01.019

Du, X. H., Huang, J. C., Chen, H. M., Chou, H. S., Lai, Y. H., Hsieh, K. C., Jang, J. S. C., & Liaw, P. K. (2009). Phase-separated microstructures and shear-banding behavior in a designed Zr-based glass-forming alloy. Intermetallics, 17(8), 607-613. https://doi.org/10.1016/j.intermet.2009.01.019

Du XH, Huang JC, Chen HM, Chou HS, Lai YH, Hsieh KC et al. Phase-separated microstructures and shear-banding behavior in a designed Zr-based glass-forming alloy. Intermetallics. 2009 Aug;17(8):607-613. https://doi.org/10.1016/j.intermet.2009.01.019

Du, X.H. ; Huang, J.C. ; Chen, H.M. ; Chou, H.S. ; Lai, Y.H. ; Hsieh, K.C. ; Jang, J.S.C. ; Liaw, P.K. / Phase-separated microstructures and shear-banding behavior in a designed Zr-based glass-forming alloy. In: Intermetallics. 2009 ; Vol. 17, No. 8. pp. 607-613.