In the present study, the authors draw attention to the relationship among fragility index (m), glass-forming ability (GFA), and plasticity in various metallic glass-forming alloys (MGAs), and show that the m value is closely related to both characteristics. In particular, m can be formulated with (Poisson's ratio): =-0.179+0.312 log m, which means that high m as well as large values might be regarded as indicators of the MGAs ductility. As an example, it can be rationalized that the lowest m value (21.5 at 5 Kmin) of Ca65 Mg15 Zn20 supports both outstanding GFA and extreme brittleness.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory Program of the Korean Ministry of Science. One of the authors (E.S.P.) was supported by the Korea Research foundation Grant funded by the Korean Government (MOEHRD) (KRF-2006-214-D00066). The author is indebted to Frans Spaepen of Harvard University for thoughtful advice.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)