|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Dual-Cluster Formulas for Eutectic-Type Zr-Based Bulk Metallic Glasses
||Kaiming Han, Jianbing Qiang, Yingmin Wang, Z. R. Wang, Qing Wang, Chuang Dong
|On-Site Speaker (Planned)
Composition rule of bulk metallic glasses (BMGs) have been previously solved by using 24-electron composition formulas from the cluster-plus-glue-atom model. In the present work, multi-component Zr-based BMGs with superior high glass forming abilities (GFAs) were addressed following the dual-cluster formulism for eutectic point interpretation. The dual-cluster formula for the metallic glasses is therefore [clusterα + clusterβ](glue atoms)2,4,6, where the clusters are derived from two eutectic phases. Moreover, the number of valence electrons per unit formula is at least one close to 24. According the method, composition design in Zr-Al-Fe-Cu system was developed from the binary eutectic point Zr72.4Cu27.6. Zr63.5Al9Fe4.5Cu23 BMG alloy was designed by a dual-cluster formula [Zr-Cu4Zr9+Cu-Zr11Al3]Cu3.5Fe1.5, which exhibits large critical glass formation size (dmax=8 mm), high tensile strength of 1520 18 MPa, large room-temperature compressive plasticity (ɛP = 6.5%), high fracture toughness of 86 12 MPa m1/2 and better corrosion resistance.
||Planned: Supplemental Proceedings volume