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Erosion and fatigue behavior of coated titanium alloys for gas turbine engine compressor applications. Final report

Technical Report ·
OSTI ID:7343357

The erosion and fatigue behavior of several potentially protective coatings for reducing the severity of sand erosion degradation of titanium alloys was studied. The coatings can be ranked in the following order of decreasing merit incorporating erosion indices at 30, 60, and 90 degrees impingement: titanium carbonitride (nickel interlayer); titanium diboride (nickel interlayer); boron carbide; diffusion-bonded electroless nickel plus overlay of chromium; diffusion-bonded electroless nickel; and plasma-sprayed boron. All coatings caused fatigue strength reductions of between 22% and 80%. Shot peening reduced fatigue degradation in some cases. (GRA)

Research Organization:
Army Materials and Mechanics Research Center, Watertown, Mass. (USA)
OSTI ID:
7343357
Report Number(s):
AD-A-022344; AMMRC-TR-76-4
Country of Publication:
United States
Language:
English