Inconel718 nickel-based alloy is a superalloy with excellent properties, which is widely used in aerospace, energy, chemical and other fields. In this article, the physical properties of Inconel718 nickel-based alloy will be introduced and analyzed in detail.
1. Overview. Inconel718 nickel-based alloy is an alloy composed of nickel, chromium, iron, molybdenum and other elements, which has excellent corrosion resistance, high temperature strength and good processing properties. It is a high-temperature high-strength alloy that can maintain excellent mechanical properties and creep resistance in high-temperature environments.
2. Physical properties.
1.Density.
The density of Inconel718 nickel-based alloy is about 825g cm, which is less dense than most other superalloys. This gives it an advantage in reducing the weight of the structure, which is beneficial for improving the performance and efficiency of the aircraft.
2.Coefficient of thermal expansion.
Inconel718 nickel-based alloy has a low coefficient of thermal expansion of about 12×10^-6/℃。This means that it is able to maintain a relatively stable size and shape at high temperatures, reducing deformation and cracks caused by thermal stress.
3.Elastic modulus.
Inconel718 nickel-based alloy has a higher modulus of elasticity of about 200 GPA. This gives it high stiffness and stability when subjected to elastic deformation at high temperatures.
4.Thermal conductivity.
Inconel718 nickel-based alloy has a high thermal conductivity of about 20 W m·k. This allows it to efficiently transfer heat in high-temperature environments, which is beneficial for reducing thermal stress and improving the heat resistance of the material.
5.Melting point range.
Inconel718 nickel-based alloys have melting points ranging from 1260-1340. This means that it can maintain stable physical and chemical properties in high-temperature environments, making it suitable for a wide range of high-temperature applications.
3. Mechanical properties.
1.Tensile strength.
Inconel718 nickel-based alloy has a high tensile strength at room temperature, capable of reaching about 900MPa. At high temperatures, the tensile strength decreases slightly, but remains high.
2.Yield strength.
Inconel718 nickel-based alloy also has a high yield strength of about 600MPa. At high temperatures, the yield strength decreases slightly, but remains high.
3.Creep properties.
Inconel718 nickel-based alloy has good creep properties and is able to maintain a stable creep rate and creep resistance at high temperatures. This is important for applications that are subject to high temperatures and pressures.
4.Fatigue properties.
Inconel718 nickel-based alloy has good fatigue properties and is able to maintain high fatigue life and fatigue strength under cyclically varying loads. This is important for applications in the aerospace sector, where aircraft and engines are subjected to large fatigue loads.
Fourth, processing performance.
Inconel718 nickel-based alloy has good machinability and can be used for hot working, cold working and welding. In the processing process, it has good plasticity and machinability, and can easily manufacture parts of various shapes and sizes. In addition, Inconel718 nickel-based alloy has good corrosion and oxidation resistance, and can maintain stable performance and service life in various corrosive environments.