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NDE of material degradation by embrittlement and fatigue

 
: Altpeter, I.; Dobmann, G.

Thompson, D.O.:
Review of Progress in Quantitative Nondestructive Evaluation. 22A : Bellingham, Washington, 14 - 19 July 2002
Melville, NY: AIP, 2003 (AIP Conference Proceedings 657)
ISBN: 0-7354-00117-9
S.15-21
Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE) <29, 2002, Bellingham/Wash.>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
fatigue

Abstract
This paper presents an overview on current activities and results concerning NDE of material degradation by embrittlement and fatigue. In general we differentiate between NDT methods for the characterization of embrittlemnt and fatigue which are either microstructure or crack sensitive. At the present time there is no reliable NDE technique known which can be used on technical components to detect the onset of failure during early stages of embrittlement and fatigue. Therefore, microstructure sensitive methods are required which have potential for detecting degradation during the early stages and for infield capability. Such methods are micro-magnetic methods, eddy current methods and thermal methods. These techniques, however, have only been tested under laboratory conditions to date. The micro-magnetic method will be discussed concerning embrittlement. Results on eddy current testing by using GMR and thermal methods are documented concerning fatigue characterization.

: http://publica.fraunhofer.de/dokumente/N-19742.html