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Approaches to enthalpy approximation in numerical simulation of two-component alloy solidification

Sczygiol N.

Computer Assisted Mechanics and Engineering Sciences

2000

Vol. 7, No. 4

717-734

The paper deals with the numerical modelling of solidification of two-component metal alloys. The numerical model was worked out using the enthalpy formulation of solidification and the finite element method. The work concentrated on one enthalpy formulation, namely the basic enthalpy formulation [1].The models of solid phase growth as well as implementation details are shown in the paper [2].A comparison of the results of the numerical simulation of solidification was made for three approaches to enthalpy approximation as a function of temperature. The three approaches were called: complete, incomplete and linear. The results of simulation, for incomplete enthalpy approximation were almost identical to the results of complete approximation. The computing time for incomplete approximation was substantially lower than the computing time for complete approximation, and comparable to the computing time for linear approximation.

Powder metallurgy of the Al/Al3Ti composite.

Świderska-Środa A., Paszula J., Pakieła Z., Presz A., Wyrzykowski J.W.

Inżynieria Materiałowa

1998

R. XIX, nr 4

1159-1162

The paper is concerned with technology and properties of the two-component Al-21at%Ti alloy produced by powder metallurgy. The cast alloy was first crushed mechanically (to below 1 mm particle size) and, then, milled in a mortar mill for 5 hours. The powder was cold-pressed and then consolidated using an explosive technique. The paper presents the results of complex examinations of the powder and the consolidated solid material.