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Ultrasonic methods for the tests of quality of casts from the alloys of aluminum

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Piekarczyk W. , Kata D. , Karwiński A.

2011

tom Vol. 11, iss. 3

87-92

In this work we present the results of the check test of the properties of casts, made by the method of smelted models in the precise foundry THE ARMATURA in Lodz. Casts were made according to the new technological solution, worked out during the realization of the purposeful project. The determination of the technological parameters of the productive process, enabling making precise casts from the alloys of aluminum, made in ceramic forms about the ambient temperature was the effect of led works. The ultrasonic method was applied to the tests of proprieties received casts. The inhomogeneity of metal material and the influence of the temperature of form on the elastic proprieties of casts were investigated. Characteristic for casts values of the velocity of longitudinal and transversal ultrasonic waves were used also to calculate the materials constants: the Young modulus E, the shear modulus G and Poisson's coefficient [...]. The obtained values of the Young modulus for tested casts carried out from 70,5 GPa to 79,9 GPa. It was shown that ultrasonic tests in quick and nondestructive way allow on the examination of density and anisotropy of casts, and also can characterize of cast using their materials constants.