Effect of Temperature on Simulated Flow-Induced Vibration Wear Behavior of Inconel 690 Alloy Mated With 304 SS in Pressurized Steam/Water Environment

Steam generator tube, which is commonly made of Inconel 690 alloy, is suffered from flow induced vibration and worked under high-temperature and high-pressure water/steam environment. This working condition leads to significant synergistic damage of fretting wear and corrosion. Thus, to investigate the synergistic damage mechanism, a flow-induced vibration wear simulated method was used to investigate the flow-induced vibration wear behavior of 690 alloy tube against 304 SS plate at 100 degrees C, 200 degrees C, and 285 degrees C in steam/ water environment. Results show that the fretting wear damage decreased with temperature in water environment. But for the steam environment, fretting wear damage decreased to a minimum value at 200 degrees C and then increased to a maximum value at 285 degrees C. The synergistic damage mechanism between wear and corrosion was analyzed. Wear can damage the material surface and promote oxidation. On the other hand, the oxide layer formed on the surface can protect the surface from wear or promote wear damage, which depends on its characteristics influenced by the environment.

Automated summary

Steam generator tubes made of Inconel 690 alloy are subject to flow-induced vibration and are operated in high-temperature and high-pressure water/steam environment. This leads to significant synergistic damage from fretting wear and corrosion. To study the synergistic damage mechanism, a flow-induced vibration wear simulation method was used to investigate the wear behavior of 690 alloy tubes against 304 SS plates in steam/water environment at different temperatures. Results show that fretting wear damage decreases with temperature in water environment, but reaches a minimum value at 200 degrees C in steam environment before increasing to a maximum value at 285 degrees C. The mechanism of synergistic damage between wear and corrosion was analyzed, showing that wear can damage the material surface and promote oxidation, while the formed oxide layer can either protect the surface or promote wear damage depending on its characteristics influenced by the environment.