In recent years, aircraft operators have been driven to increased use of Non-Destructive Evaluation (NDE) to ensure airworthiness during life extensions for aging aircraft or as an integral part of a damage tolerant lifting philosophy. Major airframe static and fatigue tests are routinely used to highlight problem areas on airframes where design limitations or changes of usage may lead to early failures. The results of such tests become progressively less reliable as the age of the airframe increases and the operating conditions diverge from those under which the tests were conducted. Increased inspection, whether by visual or other means is usually the only alternative to wholesale refurbishment or replacement of aircraft or components. Almost all of the development to date of NDE techniques for corrosion detection and characterization has been concentrated on existing airframe materials, principally Aluminum alloys and steels. The current capabilities of corrosion detection techniques will be reviewed and current research aimed at areas where there is a requirement for improved detection capability will be described. New materials, such as Polymer Matrix Composites, will experience different types of 'corrosive' deterioration. The capability of NDE methods to detect material degradation in new composite materials will be discussed. Finally, reliance on NDE, choice of NDE technique and optimal scheduling of inspections all require an assessment of the reliability of NDE methods. It will be shown that a range of NDE techniques with differing capabilities and characteristics will be required to ensure compatibility with maintenance schedules if full use is to be made of NDE for life management of structures which may be subject to corrosion.
Non-Destructive Detection of Corrosion for Life Management
1995
8 pages
Report
No indication
English
Aircraft , Corrosion & Corrosion Inhibition , Quality Control & Reliability , Nondestructive Testing , Aircraft structures , Airframe materials , Corrosion , Degradation , Deterioration , Inspection , Nondestructive tests , Aircraft maintenance , Aircraft reliability , Aluminum alloys , Polymer matrix composites , Steels , Foreign technology
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