What happens to aluminum alloys when they are extruded?

When aluminum alloys undergo the extrusion process, they are forced through a die, which shapes them into the desired profile. This process allows the material to take on precise forms, such as tubes, rods, or custom shapes that meet specific engineering requirements. During extrusion, the alloys are subjected to substantial pressure and temperature, which not only facilitates shaping but can also enhance their mechanical properties, depending on the specific treatment and alloy composition used.

The shaping process is crucial in various applications, particularly in the automotive industry, where lightweight yet strong components are essential for vehicle performance and fuel efficiency. Therefore, the correct answer reflects the fundamental principle of extrusion, where the resultant shape directly corresponds to the mold or die used in the process.