A plastic FeNi-based bulk metallic glass and its deformation behavior. (20th June 2021)

• Record Type: Journal Article
• Authors: Zhou, Jing; Wang, Qianqian; Zeng, Qiaoshi; Yin, Kuibo; Wang, Anding; Luan, Junhua; Sun, Litao; Shen, Baolong
• Is Part Of: Journal of materials science & technology. Volume 76(2021)
• Page Start: 20
• Page End: 32
• Publication Date: 2021-06-20
• Subjects: FeNi-based BMG -- Plasticity -- Strength -- Structural heterogeneity -- Shear bands; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2020.11.016
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: The strength and plasticity of Fe39 Ni39 B12.82 Si2.75 Nb2.3 P4.13 bulk metallic glass (BMG) are improved simultaneously by modulating atomic-scale structure through fluxing treatment. The compression strength increases from 3074 to 4220 MPa, and the plastic strain is enlarged from 10.7 % to more than 50 %. The increased mechanical properties of the fluxed FeNiBSiNbP BMG originate from the optimization of atomic-scale structure. More icosahedral-like clusters (ILCs) and crystal-like clusters (CLCs) are found in this FeNi-based BMG with fluxing treatment, and the ILCs are usually surrounded by CLCs. Furthermore, phase separation and a sandwich-like heterogeneous structure of SB are also observed during deformation, indicating the multiscale deformation mechanism and a stable shear-band evolution. The unique "ILC surrounded by CLCs" structure and phase separation lead to a stable plastic deformation process with strong interactions of multiple shear bands, thereby the improved plasticity and strength. This work provides useful guidelines to develop strong and plastic Fe-based BMGs from a structural aspect.