Thermoplasticity of metallic glasses: Processing and applications. (June 2022)

• Record Type: Journal Article
• Authors: Sarac, Baran; Eckert, Jürgen
• Is Part Of: Progress in materials science. Volume 127(2022)
• Publication Date: 2022-06
• Subjects: Bulk metallic glass -- Thermoplastic forming -- Formability kinetics -- Relaxation -- Crystallization -- Application fields; BMG bulk metallic glass -- NVF Newtonian viscous flow -- TPF thermoplastic forming -- TTT time-temperature-transformation -- SCLR supercooled liquid region -- GFA glass-forming ability -- TPFA thermoplastic forming ability -- DSC differential scanning calorimetry -- RE rare earth -- RT room temperature -- HRTEM high-resolution transmission electron microscopy -- SAED selected area electron diffraction -- AsC as-cast -- AsF as-formed -- ESL elastostatic -- LPBF laser power bed fusion -- FEM finite element modeling -- MD molecular dynamics -- DFT density functional theory -- STZ shear transformation zone -- MEMS microelectromechanical systems -- OD oxide-derived -- NRA nanorod array -- UPD underpotential deposition -- MOR methanol oxidation reaction -- EOR ethanol oxidation reaction -- BF brightfield -- SEM scanning electron microscopy -- PMMA polymethyl methacrylate -- 3D three-dimensional -- RCWA rigorous coupled-wave analysis -- Q-factor quality factor -- aq as-quenched -- nc nanocrystalline -- dw domain wall -- AC alternating current -- DC direct current -- GMI giant magnetoimpedance -- LAR low aspect ratio -- HAR high aspect ratio -- VHR very high aspect ratio -- F flat -- XRD X-ray diffraction -- EDS energy dispersive spectroscopy; Materials science -- Periodicals; Science des matériaux -- Périodiques; 620.1105
• DOI: 10.1016/j.pmatsci.2022.100941
• Languages: English
• ISSNs: 0079-6425

Abstract

Abstract: Owing to their extremely low shear viscosity and fragility, bulk metallic glasses (BMGs) are envisioned as new net-shaping material replacing conventionally used crystalline metals for various applications. The first part of this review describes the general technique and kinetics of thermoplastic forming. The second part elaborates on the thermal processing capability of metallic glasses from atomic- to meter-scale. The micro-/nano-structure obtained after various quenching rates followed by temperature, time and heating rate dependent thermoplastic forming is described in the third section. The deformation behavior and flow kinetics of BMGs in terms of composition, mold features, and applied conditions are elaborated in the fourth section. The variation of volume and enthalpy at the supercooled liquid region, strength retention of metallic glasses compared to other conventional metals and alloys, and kinetics of liquid fragility are given in the fifth section. Finite element modeling and molecular dynamics simulations of high-temperature deformation in BMGs are presented in the sixth part. Thermally-formed BMGs used for different applications, including energy, biomedical and micro-optics, are presented in the final part. Altogether, this review provides an overview of shaping capabilities and modifications in the macro-scale properties and short-to-medium range order of BMGs upon thermoplastic forming.