Nondestructive Inspection (NDI) Through High-Velocity Oxygen Fuel (HVOF) Thermal Spray Coatings. Delivery Order 0001: Nondestructive Evaluation Exploratory Development for Air Force Systems
Abstract
High Velocity Oxygen Fuel (HVOF) thermal spray coatings are the leading candidates to replace electrolytic hard chrome (EHC) coatings on critical high strength steel components such as aircraft landing gear. HVOF qualification as an acceptable replacement for hard chrome plating has not been fully demonstrated, particularly for fatigue-sensitive aircraft components. One area lacking is the ability to inspect through these coatings for substrate damage. Three nondestructive inspection (NDI) techniques were used to determine the detectability of fatigue cracks under the HVOF coatings. The detectability of cracks through HVOF using magnetic particle inspection proved to be unsuccessful. Crack detection through HVOF coatings using eddy current proved to be unreliable and ambiguous. Ultrasonic inspection through HVOF coatings proved to be a reliable method of crack detection for this study s test specimen geometry.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2002
- Accession Number
- ADA419290
Entities
People
- John Brausch
- Noel Tracy
- Sandra Davis
Organizations
- Universal Technology Corporation (United States)