Adhesion evaluation of TiN and (Ti, Al)N coatings on titanium 6Al-4V

Book · Tue Dec 31 04:00:00 EST 1996

OSTI ID:470932

James, R D; Gruss, K A; Horie, Y; Davis, R F ^[1]; Paisley, D L ^[2]; Parthasarthi, S; Tittmann, B R ^[3]

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1. North Carolina State Univ., Raleigh, NC (United States)
2. Los Alamos National Lab., NM (United States)
3. Pennsylvania State Univ., University Park, PA (United States). Dept. of Engineering Science and Mechanics

The metallic components of gas turbine engines are continually subjected to hostile atmospheres. Nitride coatings improve the performance of the metallic compressor blades in these engines. To assess the adhesion of nitride coatings on metals, titanium 6% aluminum 4% vanadium substrates were coated with titanium nitride (TiN) using both cathodic arc and electron beam evaporation. Titanium aluminum nitride ((Ti, Al)N) was also deposited using cathodic arc evaporation. The interfaces of the coated samples were loaded in tension using a high speed shock wave which caused spallation either at the interface, in the coating or in the metal. Scanning acoustic microscopy analysis of the spalled samples detected delaminations at the interface in the samples deposited by cathodic arc evaporation. DYNA2D modeling of plate impact spallation experiments revealed the tensile adhesion strength for TiN deposited by both techniques was {approx} 2.0 GPa. The tensile adhesion strength for (Ti, Al)N was less than 1.5 GPa.

• OSTI ID: 470932
• Report Number(s): CONF-951155--; ISBN 1-55899-313-4
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
ADHESION
ALUMINIUM ALLOYS
ALUMINIUM NITRIDES
EXPERIMENTAL DATA
GAS TURBINE ENGINES
HARDNESS
IMPACT TESTS
INTERFACES
MECHANICAL PROPERTIES
SUBSTRATES
SURFACE COATING
TITANIUM ALLOYS
TITANIUM NITRIDES
VANADIUM ALLOYS