Time–temperature–transformation diagram and microstructures of bulk glass forming Pd40Cu30Ni10P20

Crystallization kinetics and glass-forming ability of bulk metallic glasses Pd40Cu30Ni10P20 and Zr41.2Ti13.8Cu12.5Ni10Be22.5 from classical theory

Due to their scientific significance and potential engineering applications, bulk metallic glasses are among the most intensively studied advanced materials. Understanding the glass-forming ability GFA of these metallic alloys is a long-standing subject. While a large number of empirical factors have been proposed to correlate with GFA of the alloys, a full understanding of GFA remains a goal t...

Time – temperature – transformation diagram and microstructures of bulk glass forming Pd 40 Cu 30 Ni 10 P 20

Isothermal crystallization studies were performed on the bulk glass forming alloy Pd40Cu30Ni10P20 in the undercooled liquid region between the glass transition and liquidus temperature, resulting in a complete time–temperature–transformation ~TTT! diagram for crystallization. The TTT diagram shows a typical ‘‘C’’ shape with the nose at 50 s and 680 K. Assuming steady state nucleation and a diff...

Steady-state tensile viscous flow forming of bulk metallic glass

Tensile viscous flow is explored as a forming method for metallic glasses in their supercooled liquid temperature region. Bulk amorphous preforms with nominal alloy composition Zr55Cu30Al10Ni5 were produced by arc melting and tiltand suction casting into a copper mould. A simple loading rig, in which the preform is suspended from a wire, combined with selective heating of the section to be defo...

Comment on "Pressure-induced amorphization of ZrTiCuNiBe bulk glass-forming

On the Fragility of Bulk Metallic Glass Forming Liquids

In contrast to pure metals and most non-glass forming alloys, metallic glass-formers are moderately strong liquids in terms of fragility. The notion of fragility of an undercooling liquid reflects the sensitivity of the viscosity of the liquid to temperature changes and describes the degree of departure of the liquid kinetics from the Arrhenius equation. In general, the fragility of metallic gl...