Effect of CrAlTiN Coating on Fretting Wear Behavior of Inconel 690 Alloy in Dry and Seawater Conditions

An important area of research in the realm of nuclear materials is how to efficiently use sophisticated coating methods to increase the fretting wear resistance of steam generator tubes. In this work, the surface of Inconel 690 alloy was coated with CrAlTiN using magnetron sputtering method. The mechanical and surface microstructural characteristics of prepared coating were examined. The fretting wear behavior of test samples treated with coatings and those treated with substrates was compared experimentally in both seawater condition and dry state. The CrAlTiN coating was found to be an efficient way to improve the fretting wear resistance of the Inconel 690 alloy tube, according to the findings of the experiments. A certain amount of fretting wear could be acerated by seawater. Furthermore, delamination and abrasive wear were the primary causes of failure for all test samples.