What Is The Thermal Expansion Coefficient Of Inconel 718?

What is the thermal expansion coefficient of Inconel 718?

What is the thermal expansion coefficient of Inconel 718?

The thermal expansion coefficient of Inconel 718 changes with temperature.

Inconel 718 is a nickel-based high-temperature alloy that is widely used in aviation, aerospace and other high-temperature environments because of its good overall properties in the temperature range of -253°C to 700°C. Specifically, the linear thermal expansion coefficient of Inconel 718 alloy is approximately 13×10^-6/°C near room temperature. This means that when the temperature increases by 1°C, the material will grow by 13 microns per meter per unit length. As the temperature increases further, this coefficient will increase accordingly. For example, at a high temperature of 800°C, the linear thermal expansion coefficient will increase to 14.2×10^-6/°C.

In addition, the bulk thermal expansion coefficient also shows a similar trend, but the value is slightly higher than the linear thermal expansion coefficient. This is because the volumetric expansion of a material includes not only changes in length, but also changes in width and height.

Understanding the thermal expansion coefficient of Inconel 718 alloy is critical to design and application as it helps engineers predict and calculate the material's behavior under changes in temperature to ensure structural integrity and functional reliability.