Determination of the Position of Solid/Liquid Interface During Solidification and Melting of Metals With Vibrational Parameters

The paper proposes the method to locate the solid / liquid interface with vibrational parameters during solidification for the first time. The sufficient difference in resistance to shear stresses between liquid and solid phases of metals and alloys permits the application of vibrational parameters to locate the interface in real time and in situation during solidification. Based on the solidification theory, continuum mechanics, vibrational modal analysis and sensitivity analysis, the author established the mechanical model and the dynamical equations of typical Bridgman solidifying system, derived the sensitivity of eigenvalues of the Bridgman system to the location of the solid / liquid interface as well as the calculating formulae concerned. The experimental results are quite accordant with those of computed ones.