Structural Changes in the Alloy of Aluminum - Magnesium System
The purpose of this work is to study the structure and mechanical properties of an aluminum - magnesium system alloy after various types of heat treatment (quenching and aging). The microstructure of the alloy has been studied using a Zeiss OBSERVER.D1m microscope combined with a camera and image display on a monitor screen. Micro X-ray spectral analysis was performed on a Carl Zeiss EVO 50 scanning electron microscope. The microhardness of the samples has been measured on prepared metallographic sections by means of a DM8 microhardness meter. In the course of the process it has been found that quenching the Al-12.78% Mg alloy from temperatures of 430-440 ° C does not lead to the formation of a single-phase solid solution. Aging at 100 ° C promotes the formation of secondary phases. It was noted that with an increase in the quenching temperature, the microhardness increases slightly. An increase in the exposure time doesn't influence greatly the microhardness of the alloy, while the structure remains practically unchanged.