Automated thermal impedance scanning (ATIS) system for NDE (nondestructive examination) of coatings on turbine engine parts

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:6234448

Green, D. R.; Voyles, J. W.; Prati, J. H.

Thermal spray coatings have been gaining increased application throughout industry in recent years. The quality of the coating-to-substrate bond is of prime importance in many of these applications. This paper describes an Automatic Thermal Impedance Scanning (ATIS) system to provide completely automatic nondestructive examination (NDE) for thermal spray coating bonds in turbine engine parts. This system is being installed as part of an experimental automated production facility at the Teledyne CAE plant in Gainesville, GA. Thermal spray processes utilize a hot, high velocity gas stream to heat either a powder or wire to a plastic or molten state. The high velocity gas accelerates the hot particles to a high velocity before they are allowed to impact the surface to be coated. These particles adhere to the previously roughened surface (grit blast) by predominantly mechanical means. In some cases, depending on the part material and material sprayed, a quasi metallurgical bond can be formed. 19 figs.

• Research Organization: Hanford Engineering Development Lab., Richland, WA (United States)
• DOE Contract Number: AC06-76FF02170
• OSTI ID: 6234448
• Report Number(s): HEDL-SA-3600; CONF-861076-11; ON: DE89011033
• Resource Relation: Conference: Fall meeting of the Metallurgical Society of AIME, Orlando, FL, USA, 5 Oct 1986; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
SPRAY COATING
NONDESTRUCTIVE TESTING
TURBINE BLADES
BONDING
DESIGN
IMPEDANCE
PLASMA ARC SPRAYING
SUBSTRATES
SURFACE PROPERTIES
TURBOFAN ENGINES
WEAR RESISTANCE
DEPOSITION
ENGINES
FABRICATION
JOINING
MATERIALS TESTING
MECHANICAL PROPERTIES
SURFACE COATING
TESTING
420500* - Engineering- Materials Testing
320201 - Energy Conservation
Consumption
& Utilization- Transportation- Air & Aerospace