Identification of the steel viscosity and dynamic yield stress for the numerical modelling of casting simulations in the semi-solid state

Sołek, K.

doi:10.1515/amm-2017-0027

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…For two Al alloys, it was found that the isostructural yield stress is less than 1/10 of the static value, which was for both alloys about 400 Pa. Comparable experiments have been performed by Solek [73] with high carbon steel, which confirms the above-mentioned findings.…”

Section: Yield Stresssupporting

confidence: 73%

Rheological Characterization of Semi-Solid Metals: A Review

Modigell

Pola

Tocci

2018

Metals

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In the present review, the main findings on the rheological characterization of semi-solid metals (SSM) are presented. Experimental results are a fundamental basis for the development of comprehensive and accurate mathematics used to design the process effectively. For this reason, the main experimental procedures for the rheological characterization of SSM are given, together with the models most widely used to fit experimental data. Subsequently, the material behavior under steady state condition is summarized. Also, non-viscous properties and transient conditions are discussed since they are especially relevant for the industrial semi-solid processing.

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Section: Yield Stresssupporting

confidence: 73%

Rheological Characterization of Semi-Solid Metals: A Review

Modigell

Pola

Tocci

2018

Metals

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“…The movement of liquid steel is described by Navier-Stokes equations resulting from the momentum balance, supplemented with mass conservation equations [1,2,11,44]. They contain both the dynamic viscosity coefficient and the kinematic viscosity coefficient [45][46][47]. Modelling the stress distribution during casting involves the need to declare the rheological parameters i.e., the Young modulus, the Poisson's ratio, yield stress, ultimate yield stress, plastic strain and thermal expansion.…”

Section: Material-related Parametersmentioning

confidence: 99%

Control and Design of the Steel Continuous Casting Process Based on Advanced Numerical Models

Miłkowska-Piszczek

Falkus

2018

Metals

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The process of continuous casting of steel is a complex technological task, including issues related to heat transfer, the steel solidification process, liquid metal flow and phase transitions in the solid state. This involves considerable difficulty in creating the optimal process control system, which would include the influence of all the physico‐chemical phenomena which may occur. In parallel, there is an intensive development of new mathematical models and an increase in computer performance, therefore complex numerical simulations requiring substantial computing time can be conducted. This paper presents a review of currently applied numerical methods allowing the phenomena accompanying the process of continuous casting of steel to be accurately represented. Special attention was paid to the selection of appropriate methods to solve the technological problem selected. The possibilities of applying selected numerical models were analysed in order to modify and improve the existing process or to design a new one linked to the implementation of new steel grades in the current production. The description of the method of defining the boundary conditions, initial conditions and material parameters as vital components ensuring that numerical calculations based upon them in the finite element method, which is that most frequently applied, are correct is an important element of the paper. The possibility of reliably defining the values of boundary parameters on the basis of information on the intensity of cooling in individual zones of the continuous casting machine was analysed.

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“…It included the rheological identification of the selected alloys from a wider perspective with regards to the influence of temperature and the non-dilatational strain rate. Examinations of the rheological properties of the steel alloys carried out as part of the work were used for evaluating the possibilities for applying thixoforming for these alloys [18][19][20][21][22] The methodology of analyzing the rheological properties enabled material tests to be conducted for a broad range of forming parameter values. These parameters substantially impact the material behavior.…”

Section: Rheological Analysis Of High-melting-point Alloys In the Semi-solid Statementioning

confidence: 99%

Thixoforming of High-Melting-Point Alloys

Sołek

2017

mafe

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Processing of steel in the semi-solid state concerns mainly continuous casting and thixoforming processes. Continuous casting is usually applied within the confines of steel making processes. Due to stringent process requirements, thixotropic forming of steel alloys has not been practically applied in industry yet. However, it is believed that this method could be used for forming selected products. Thixoforming could be treated as alternative method of production for forging techniques in the case non-plastic alloys. In this paper the method of development of globular microstructure, thixoforming process and analysis of rheological properties of selected steels were described.

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Identification of the steel viscosity and dynamic yield stress for the numerical modelling of casting simulations in the semi-solid state

Cited by 7 publications

References 11 publications

Rheological Characterization of Semi-Solid Metals: A Review

Rheological Characterization of Semi-Solid Metals: A Review

Control and Design of the Steel Continuous Casting Process Based on Advanced Numerical Models

Thixoforming of High-Melting-Point Alloys

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