Specific Coatings are used to further increase performance of titanium alloy parts at elevated temperatures. More specifically, Chromium Nitride (CrN) Coatings are designed to perform under conditions of high load and temperature. By using scratch testing it is possible to detect premature adhesive failure of the CrN coating in real-life applications. The test was performed at standard temperature but the test could also be performed at high temperature to better simulate the conditions to which the coating is subjected.
APPLICATION NOTE: http://www.nanovea.com/Application%20Notes/microscratchtitaniumalloy.pdf