How does the strength of aluminum change with temperature?

The strength of aluminum decreases with increasing temperature. As temperature rises, aluminum undergoes thermal expansion, which can lead to a reduction in its yield strength and tensile strength. This is because the increased thermal energy causes the aluminum atoms to vibrate more, weakening the metallic bonds. At very high temperatures, aluminum can become ductile and may even lose its structural integrity. Conversely, at very low temperatures, aluminum can become brittle, which also affects its strength negatively. Therefore, the optimal temperature for maintaining the strength of aluminum is typically within its normal operating range.