A CALPHAD (CALculation of PHAse Diagrams)-based viscosity model for Al-Ni-Fe-Co melt system

Shi, Renhai; Avey, Thomas; Luo, Alan A.

doi:10.1016/j.molliq.2019.111271

Cited by 23 publications

(9 citation statements)

References 35 publications

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“…None of the models such as the Kaptay, Kozlov, Hirai, Moelwyn-Hughes, Iida-Ueda-Morita, Terzieff as well as Calphad type modelling, MD simulations and ab initio calculations 16,30,31,71,72,90,91 compared to the Ni-Al viscosity experimental data 26,27,30,55,56,61 describe accurately the behaviour of the viscosity. Around the equiatomic composition, the largest differences between the experimental data 26,27,40 and the model-predicted values are observed (Figure 3).…”

Section: Model-predicted Viscosity Isotherms Of Liquid Ni-al Binary A...mentioning

confidence: 98%

“…24,28 To avoid these inconveniences, over the last two decades, a few measurements using containerless electromagnetic levitation (EML) during parabolic flights (PFs) 13,30 or on board the ISS 14 were performed. Concerning the models, the Arrhenius equation is widely used to describe the temperature dependence of viscosity, 23,28 while none of the existing models describes fairly well the concentration-dependent viscosity data neither of Ni-Al 23,27,31 nor of Ni-based alloy melts. 16 Accordingly, the use of two or more models is useful to construct and interpret confidence intervals for predicted values that, combined with the experimental data obtained by different experimental methods, are necessary for data reliability assessment.…”

Section: Introductionmentioning

confidence: 99%

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Viscosity of liquid Ni-based industrial alloys: experiments versus theory

Novakovic,

Giuranno,

Mohr

et al. 2024

International Materials Reviews

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The aim of this review is to succinctly review recent progress in experimental and theoretical investigation of the viscosity of binary and multicomponent Ni–Al-based industrial alloys, summarising the current state of knowledge of the topic. Viscosity data are important for simulation of microstructural evolution during solidification-related processes such as casting. Therefore, to obtain accurate predictions of defect-free microstructure, only reliable input data are required. Based on the synergy between experiment and theory, a review of the literature provides a critical evaluation of temperature- and composition-dependent viscosity data available from existing studies carried out over the last 60 years. The purpose of this review is threefold: to discuss container-based viscometer methods and alternative containerless processing via electromagnetic levitation during parabolic flights and on board the International Space Station; to analyse the viscosity models including their validation; and to refer to the first two points, to interpret the viscosity data.

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Section: Model-predicted Viscosity Isotherms Of Liquid Ni-al Binary A...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Viscosity of liquid Ni-based industrial alloys: experiments versus theory

Novakovic,

Giuranno,

Mohr

et al. 2024

International Materials Reviews

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“…However, the weld beam was a kind of Ni-based alloy. The viscosity of the Ni-based liquid alloy was negatively correlated with temperature [19,20]. With the filling rate increased, the temperature of the molten pool increased and the viscosity decreased.…”

Section: Influence Mechanism Analysis Of Thermitementioning

confidence: 98%

Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance

Zhang

Guo

et al. 2020

Materials

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Real-time electric signal, matter transfer mode and welding pool behavior were obtained to investigate the effect of wires’ filling rate on arc stability and joints’ appearance during underwater wet flux-cored arc welding (FCAW). The electric signal results showed that arc stability first decreased and then increased rapidly because the raise of filling rate affected the number of charged particles and the electrical conductivity of welding arc atmosphere. Two typical transfer modes, globular repelled transfer mode and surface tension transfer mode, were observed in this study. The ratio of surface tension transition could be increased by adding wires’ filling rate. Meanwhile, the geometry of molten pool was changed and the distance between droplets to welding pool reduced as the filling rate increased. The fusion line became more regular and the radius of curvature increased under the effect of bubbles in the molten pool. As the filling rate improving, more slags on the welds surface were acquired and the welds were much flatter and smoother.

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“…However, a molten alloy can not be considered as an ideal mixture, and there are often discrepancies between predictions and experiments [16,17,18]. On the other hand, it is also difficult to define the thermodynamic parameters within the thermodynamic viscosity models for multicomponent melt systems [19]. Thus, the refinement of absolute values and the development of universal models of viscosity is still one of the important problems of modern thermal physics and condensed matter physics [20].…”

Section: Introductionmentioning

confidence: 99%

Viscous Properties of Nickel-Containing Binary Metal Melts

Khusnutdinoff,

Khairullina,

Beltyukov

et al. 2020

Preprint

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The paper presents the results of molecular dynamics study of the viscosity of nickel-containing binary metal melts for a wide range of temperatures, including the region of the equilibrium liquid phase and supercooled melt. It is shown that the temperature dependencies of the viscosity of binary metal melts are described by the Kelton's quasi-universal model. Based on the analysis of the viscosity coefficient of the binary melt composition within the framework of the Rosenfeld's scale transformations, it has been established that to correctly describe the viscosity of binary/multicomponent metal melts within the framework of entropy models, it is necessary to use a more complex representation of the excess entropy S ex than in the approximation of pair correlation entropy S 2 .

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A CALPHAD (CALculation of PHAse Diagrams)-based viscosity model for Al-Ni-Fe-Co melt system

Cited by 23 publications

References 35 publications

Viscosity of liquid Ni-based industrial alloys: experiments versus theory

Viscosity of liquid Ni-based industrial alloys: experiments versus theory

Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance

Viscous Properties of Nickel-Containing Binary Metal Melts

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