Detection and Characterization of Hidden Corrosion in Aircraft Lap Joints by Optical NDT Method

2018 ◽  
Vol 48 (2) ◽  
pp. 20170389
Author(s):  
M. S. Safizadeh ◽  
M. R. RasouliNasab
Keyword(s):  
Lap Joints ◽  
Hidden Corrosion

Time-resolved infrared radiometry (TRIR) using a focal-plane array for characterization of hidden corrosion

1993 ◽  
Author(s):  
Jane W. Maclachlan Spicer ◽  
W. D. Kerns ◽  
Leonard C. Aamodt ◽  
Robert Osiander ◽  
John C. Murphy
Keyword(s):  
Focal Plane ◽  
Focal Plane Array ◽  
Time Resolved ◽  
Infrared Radiometry ◽  
Hidden Corrosion

Characterization of resistance-welded thermoplastic composite double-lap joints under static and fatigue loading

2013 ◽  
Vol 28 (6) ◽  
pp. 762-776 ◽  
Author(s):  
Martine Dubé ◽  
Aurélie Chazerain ◽  
Pascal Hubert ◽  
Ali Yousefpour ◽  
Harald EN Bersee
Keyword(s):  
Fatigue Loading ◽  
Lap Joints ◽  
Thermoplastic Composite

scholarly journals Microstructure and interface characterization of dissimilar friction stir welded lap joints between Ti–6Al–4V and AISI 304

2014 ◽  
Vol 56 ◽  
pp. 139-145 ◽  
Author(s):  
Kaio Niitsu Campo ◽  
Leonardo Contri Campanelli ◽  
Luciano Bergmann ◽  
Jorge Fernandez dos Santos ◽  
Claudemiro Bolfarini
Keyword(s):  
Lap Joints ◽  
Aisi 304 ◽  
Friction Stir ◽  
Interface Characterization

Characterization of lap joints laser beam welding of thin AA 2024 sheets with Yb:YAG disk-laser

2012 ◽  
Author(s):  
Fabrizia Caiazzo ◽  
Vittorio Alfieri ◽  
Francesco Cardaropoli ◽  
Vincenzo Sergi
Keyword(s):  
Laser Beam ◽  
Laser Beam Welding ◽  
Lap Joints ◽  
Disk Laser ◽  
Aa 2024

Surface and mechanical characterization of stationary shoulder friction stir welded lap joints: experimental and numerical approach

2020 ◽  
Vol 13 (5) ◽  
pp. 725-736
Author(s):  
Gianluca Buffa ◽  
Livan Fratini ◽  
Filomena Impero ◽  
Attilio Masnata ◽  
Fabio Scherillo ◽  
...  
Keyword(s):  
Mechanical Characterization ◽  
Numerical Approach ◽  
Lap Joints ◽  
Friction Stir ◽  
Stationary Shoulder

Pulsed Eddy-Current Measurements of Corrosion and Cracking in Aging Aircraft

1997 ◽  
Vol 503 ◽  
Author(s):  
J. C. Moulder ◽  
J. A. Bieber
Keyword(s):  
Eddy Current ◽  
Current System ◽  
Fatigue Cracks ◽  
Single Frequency ◽  
Pulsed Eddy Current ◽  
Wide Range ◽  
Lift Off ◽  
Hidden Corrosion ◽  
Time Gating

ABSTRACTPulsed, or transient eddy-current methods are an effective tool for quantitative characterization of hidden corrosion and cracking in multi-layer aircraft structures. Eddy currents are the method of choice for this task, since they penetrate multiple layers of metal, whether or not the layers are mechanically bonded. The pulsed eddy-current technique is an important advance over conventional eddy-current methods because it rapidly acquires data over a wide range of frequencies, thereby providing more information than a conventional, single-frequency eddy-current instrument. We have combined a pulsed eddy-current instrument with a portable two-axis scanner to produce an instrument capable of rapidly scanning aircraft lap splices in situ, producing pseudo-color images that reveal hidden corrosion or cracking. A unique feature of time-domain eddy-current data is the ability to selectively filter clutter from the image by time-gating the pulsed signal. Time-gating permits the user to select the inspection depth, thereby eliminating interference from upper layers, air gaps, lift-off variation and fasteners. By using a theoretical model of the pulsed eddy-current system, it is possible to interpret the data quantitatively, yielding quantitative maps of corrosion damage. Some of the same advantages of the pulsed eddycurrent technique apply to the characterization of hidden fatigue cracks as well, although the tieory for crack signals is less advanced.

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