Structure and properties of some glass-forming liquid alloys

Dahlborg, U.; Calvo-Dahlborg, M.; Popel, P. S.; Сидоров, В. Е.

doi:10.1007/s100510051073

Cited by 92 publications

(60 citation statements)

References 2 publications

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“…And the higher the temperature above the critical, the shorter the "incubation period" of the melt structure transition, and the faster the transition speed, which accord with the kinetics characteristic of structure transition. It is generally accepted that the atomic bonds of crystals are only partly broken on melting, and the short-range orders derived from the corresponding solid crystal remain still in melt within a wide temperature range above the liquidus [20] . For liquid Sn-Bi40 alloy, the melt mainly consists of Sn-rich clusters and Bi-rich clusters within a certain range above the melting point [21] .…”

Section: Resultsmentioning

confidence: 99%

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

Chen

et al. 2008

Sci. China Ser. E-Technol. Sci.

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Evolution of the electrical resistivity of Sn-40wt%Bi melt with time under different overheating temperatures during isothermal experiments has been studied, and the relationship between different melt state, solidification behavior and solidified structure has also been investigated. The results show that the melt structure transition revealed by the abnormal change of resistivity would take place within a certain holding time just when the holding temperature is above a certain critical, and that the higher the temperature above the critical, the shorter the "incubation period" of the melt structure transition, and the faster the transition speed. The results of solidification experiments suggest that the melt structure transition caused by different holding time at the same temperature can lead to a higher solidification undercooling degree, finer grain size and change of microscopic pattern. Further exploration indicates that the solidification undercooling degree can come to a head when the melt is held at the specific temperature for a given time. The functionary mechanism of the phenomena above is also discussed briefly.Sn-Bi alloy, electrical resistivity, melt structure transition, solidified structure

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Section: Resultsmentioning

confidence: 99%

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

Chen

et al. 2008

Sci. China Ser. E-Technol. Sci.

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“…It is generally accepted that liquid structures have close relationships with the microstructures and properties of their corresponding alloys [1,2]. Exploring the characteristic of melts near the melting point will be especially helpful to understand the nature of liquid structure and explain the mechanism of grain refinement [3].…”

Section: Introductionmentioning

confidence: 99%

Heredity of medium-range order structure from melts to the microstructure of Ni–Cr–W superalloy

Gao

Wang

et al. 2015

Appl. Phys. A

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The structure factor S(Q), intensities and pair distribution function g(r) of liquid Ni-Cr-W superalloy at different temperatures have been measured by a hightemperature X-ray diffractometer. Coordination N min , correlation radius r c , the nearest atomic distance r 1 , solidification microstructure and compression performance have been studied. The results show that a pre-peak exists on the structure factor curve at the liquidus temperature, and a fine structure of equiaxed, globular and non-dendritic primary grains can be achieved by casting the alloy at liquidus temperature. Liquid structure feature of Ni-Cr-W superalloy is found to depend on temperature. During the solidification, some structural information carried by the medium-range order (MRO) structure is inherited from the melt to the microstructure, which is beneficial for grain refinement. The maximum yield strength measured from typical microstructure of the equiaxed and non-dendritic grains at 1400°C is 543 MPa. The results show that refinement and non-dendritic grain is beneficial to the improvement of the yield strength.

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“…The effect of temperature in preparing the melt before casting, which is aimed at creating an amorphous structure in iron-based alloys, was investigated in a number of works [2][3][4][5][6]. It was shown that with increasing the temperature of the melt before casting the ribbon becomes more plastic, its electrical resistance and crystallization temperature grow, and its density lowers.…”

Section: Introductionmentioning

confidence: 99%

Melt Viscosity of the Soft Magnetic Nanocrystalline Fe_72.5Cu₁Nb₂Mo_1.5Si₁₄B₉Alloy

2017

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Abstract. Temperature dependences of the kinematic viscosity of a multicomponent Fe 72.5 Cu 1 Nb 2 Mo 1.5 Si 14 B 9 melt have been studied. A critical temperature is detected above which the activation energy of the melt' viscous flow changes. Comparison of the temperature dependences of the kinematic viscosity of the melts prepared from the initial ingot and an amorphous ribbon shows that the melt viscosity essentially depends on the initial structural state of the alloy. In amorphous ribbon produced in the mode with overheating, and the melt is above the critical temperature, the enthalpy of crystallization grows; the following heat treatment results in an increase in magnetic permeability.

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Structure and properties of some glass-forming liquid alloys

Cited by 92 publications

References 2 publications

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

Heredity of medium-range order structure from melts to the microstructure of Ni–Cr–W superalloy

Melt Viscosity of the Soft Magnetic Nanocrystalline Fe_72.5Cu₁Nb₂Mo_1.5Si₁₄B₉Alloy

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Structure and properties of some glass-forming liquid alloys

Cited by 92 publications

References 2 publications

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

The effect of melt overheating on the melt structure transition and solidified structures of Sn-Bi40 alloy

Heredity of medium-range order structure from melts to the microstructure of Ni–Cr–W superalloy

Melt Viscosity of the Soft Magnetic Nanocrystalline Fe72.5Cu1Nb2Mo1.5Si14B9Alloy

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Melt Viscosity of the Soft Magnetic Nanocrystalline Fe_72.5Cu₁Nb₂Mo_1.5Si₁₄B₉Alloy