Structural Materials: Aluminum and Its Alloys – Properties

The intention of this chapter is to introduce the reader to the range of aluminum alloys used in the aerospace industry, their key properties, and the reasons for their selection. A brief review of the history of the aluminum industry, its role within the aerospace sector, and the current and future trends for its use is presented. Aluminum alloy metallurgy and the main methods for strengthening aluminum alloys are explained paying particular attention to age hardening. The Aluminum Association alloy designation and temper system is introduced, along with the key characteristics (typical mechanical properties and aerospace applications) of the seven main wrought alloy series. Recent alloy developments, in particular aluminum lithium alloys are highlighted.