The structure and properties formation of the modificated Al − Mg − Si − Cu alloy

Abstract

Purpose. Determining the laws of the complex effect of modification on the Al−Mg−Si−Cu AL28 alloy structure formation and mechanical properties in cast and heat-treated states and optimization of the parameters of the complex modifying − heat treatment to obtain a new material with a high complex of properties based on the alloy under study. Methodology. The microstructural, X-ray, spectral analysis, hardness measurement, tensile tests are used. The studies were carried out according to standard methods on the equipment that passed the state verification. Originality. The determination of the structure formation of the Al−Mg−Si−Cu AL28 alloy under the conditions of the complex effect of 0.05 % Sr and 0.05 % TiCN modification and heat treatment was carried out for the first time. Practical value. The established regularities made it possible to optimize the qualitative and quantitative composition of the modification and the thermal and temporal parameters of heat treatment; as a result, a material with a significantly increased complex of mechanical properties was obtained.