With the very rapid development of automobile and aircraft construction, the question of obtaining materials that are lightweight and at the same time have sufficient mechanical properties is becoming more and more relevant. The best and, so far, unsurpassed in this regard are alloys such as duralumin, with approximate content (see article). The alloy of duralumin, as you can see, is relatively complex and therefore experiments have long been carried out in different places around the globe to obtain simpler alloys that would be not inferior to duralumin in their mechanical qualities. Of these simple alloys, the most successful, especially in America, is an alloy of aluminum and copper. The nature of this alloy has not yet been sufficiently elucidated. Therefore, in order to clarify the issue in more detail, it seemed appropriate to us to study the change in the solubility of copper in aluminum in the solid state depending on temperature, since according to available data, such a change in the solubility of various components in alloys is the main reason determining the properties of alloys such as duralumin, including property of "aging".
