High-temperature creep study of tube sheet materials

High-Temperature Creep Characteristics: Under sustained stress at high temperatures, tube sheet materials undergo slow plastic deformation, known as creep. The deformation is initially rapid, then enters a steady state where the deformation rate stabilizes. If the stress or temperature is too high, it accelerates deformation, ultimately leading to tube sheet failure and affecting the long-term operation of the heat exchanger.

Material Selection Impact: Using high-temperature resistant alloys, such as nickel-based materials, can significantly reduce the creep rate of tube sheets. These materials strengthen grain boundaries and inhibit vacancy diffusion, delaying the accumulation of creep damage and ensuring structural integrity in high-temperature environments.

Applications and Optimization: In the chemical and aerospace industries, tube sheet materials require performance verification through creep testing. Optimizing heat treatment processes and stress distribution design can reduce the risk of creep, extend equipment lifespan, and meet the demands of high-temperature operating conditions.