J. Mater. Sci. Technol. ›› 2014, Vol. 30 ›› Issue (6): 560-565.DOI: 10.1016/j.jmst.2013.11.014

• Research-article • Previous Articles     Next Articles

Structure Heterogeneity in Metallic Glass: Modeling and Experiment

Ke H.B., Zeng J.F., Liu C.T., Yang Y.*   

  1. Centre for Advanced Structural Materials, Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong, China
  • Online:2014-06-20 Published:2014-07-31
  • Contact: Corresponding author. Ph.D.; Tel.: +852 3442 9394

Abstract: Despite the great efforts dedicated to metallic glasses (MGs), their structure still remains a mystery to be understood. With comparison to the existing micromechanical models, such as the free-volume and shear transformation zone (STZ) models, we first discuss in this article our recently proposed ‘core-shell’ model, which contains a solid-like matrix and liquid-like inclusions. This serves as the theoretical basis to understand the structural heterogeneity in MGs in our analytical framework. After that, a scanning ultrafast nanoindentation technique is used to map out the structure heterogeneity in a Zr-based bulk metallic glass (BMG). With these ongoing research efforts, we hope that more research work could be stimulated in the pursuit of the structure-property relation in MGs.

Key words: Metallic glass, Structure heterogeneity, Nanoindentation, Core-shell model