Changes in mechanical properties under low temperature environment
In low temperature environments, the mechanical properties of Aluminum Alloy Die Casting products will change significantly. As the temperature decreases, the lattice structure of the aluminum alloy shrinks and the forces between atoms increase, which increases the strength and hardness of the material. For example, its yield strength and tensile strength may be increased, which seems to be more beneficial at low temperatures for some structural parts that need to bear larger loads. However, low temperatures also cause the material's toughness to drop significantly, making it more brittle and hard. This means that Aluminum Alloy Die Casting products are more prone to brittle fracture when subjected to impact or sudden external force. The situation that can withstand a certain degree of deformation without breaking at normal temperature may no longer exist, which is very important for use in cold environments. Die cast products are a potential risk.
Evolution of mechanical properties in high temperature environment
When in a high temperature environment, the mechanical properties of Aluminum Alloy Die Casting products show a different change trend from that in a low temperature environment. High temperatures will intensify the thermal motion of aluminum alloy atoms and make the lattice structure relatively loose. This results in a reduction in the strength and stiffness of the material, for example, the tensile strength and yield strength gradually decrease with increasing temperature. However, the toughness of aluminum alloys usually increases in high-temperature environments, making the material more susceptible to plastic deformation. However, if the temperature is too high, it may cause over-burning of the material, seriously destroying its internal structure and drastically deteriorating its mechanical properties. This change in mechanical properties at high temperatures requires the stability and reliability of performance to be considered for die-cast products used under high-temperature conditions, such as parts near engines.
Effect of temperature cycling on mechanical properties
In actual applications, Aluminum Alloy Die Casting products may experience temperature cycling. Repeated temperature changes create thermal stresses within the product, which interact with external loads. After multiple temperature cycles, microcracks may be generated and expanded inside the product, further weakening the material's mechanical properties. In particular, materials have different expansion and contraction coefficients at different temperatures. This difference will intensify the accumulation of internal stress, accelerate the damage process of the product, and reduce its service life and reliability.
Measures to deal with the effects of temperature
In order to deal with the impact of ambient temperature on the mechanical properties of Aluminum Alloy Die Casting products, some measures can be taken. In terms of material selection, you can choose aluminum alloy grades that are more suitable for specific temperature environments, and their composition and organizational structure have better tolerance to temperature. During the design stage, consider the operating temperature range of the product and reduce the impact of temperature stress by optimizing the structure, such as adding rounded corners and avoiding stress concentration. In addition, die-cast products can also be subjected to appropriate heat treatment or surface treatment to improve the stability of their mechanical properties in different temperature environments.
