Eddy current solutions applicable to the problem of nondestructive inspection of flat and cylindrical surface layer

1984 ◽  
Vol 4 (1) ◽  
pp. 29-38
Author(s):  
Ton Tran-Cong
Keyword(s):  
Surface Layer ◽  
Eddy Current ◽  
Cylindrical Surface ◽  
Nondestructive Inspection

Eddy Current Pulsed Thermography for Noncontact Nondestructive Inspection of Motor Winding Defects

2020 ◽  
Vol 20 (5) ◽  
pp. 2625-2634
Author(s):  
Yu Peng ◽  
Shoudao Huang ◽  
Yunze He ◽  
Xin Guo
Keyword(s):  
Eddy Current ◽  
Nondestructive Inspection ◽  
Pulsed Thermography

scholarly journals Nondestructive Inspection Method for Jet Engine Turbine Blades

1973 ◽  
Author(s):  
I. R. Kraska ◽  
W. L. Berndt
Keyword(s):  
Air Force ◽  
Eddy Current ◽  
Turbine Blades ◽  
Nondestructive Inspection ◽  
Inspection Method ◽  
Jet Engine ◽  
One Stage ◽  
Trailing Edges ◽  
Depot Maintenance ◽  
Edge Cracks

Nondestructive inspection of jet engine turbine blades during field and depot maintenance is accomplished normally with fluorescent penetrant and/or visual techniques. In spite of the widespread use of the penetrant process, it has many disadvantages as a maintenance inspection method. The reliability of penetrant inspection depends upon the preparation of the blades prior to actual penetrant processing and the inspector’s skill in detecting and evaluating defect indications. The process can miss cracks if they are filled with material that blocks the penetrant from entering the defect. An eddy current technique which can detect leading and trailing edge cracks in turbine blades and an instrument based upon this technique were developed under Air Force sponsorship. The instrument has been tested in a rework facility and field maintenance. Results of the evaluation and photomicrographs of typical cracks detected in turbine blades are presented. Results are compared, in some instances, to results obtained with the fluorescent penetrant and/or visual examinations. A field penetrant inspection of leading trailing edges detect cracks at an inspection rate of one stage in 1 hr and 50 min.

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