Eddy Current Residual Stress Profiling in Surface-Treated Engine Alloys

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Abstract:

Recent research results indicate that eddy current conductivity measurements can be exploited for nondestructive evaluation of subsurface residual stresses in surface-treated nickel-base superalloy components. According to this approach, the depth-dependent electric conductivity profile is calculated from the measured frequency-dependent apparent eddy current conductivity spectrum. Then, the residual stress depth profile is calculated from the conductivity profile based on the piezoresistivity coefficient of the material, which is determined separately from calibration measurements using the known external applied stresses. This paper reviews the basic principles, measurement procedures, advantages, and limitations of eddy current residual stress profiling.

Author(s):
Abu-nabah, Bassam A. ; Yu, Feng ; Hassan, Waled T. ; Blodgett, Mark P. ; Nagy, Peter B.
Author Organization(s):
CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING
Descriptive Note:
Journal article
Supplementary Note:
Published in Nondestructive Testing and Evaluation, v24 n1-2 p209-232, Mar-Jun 2009. Sponsored in part by Contract no. F09650-00-D-0018.
Pagination:
0025

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
F33615-03-2-5210, FA8650-04-C-5228
Monitor Series:
AFRL
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_5.3.3_Develop Strategy; JCA_1.3.2_Personnel Management; JCA_1.2.3_Educating
Modernization Areas:
Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*NONDESTRUCTIVE TESTING, *EDDY CURRENTS, *NICKEL ALLOYS, *RESIDUAL STRESS, SUPERALLOYS, FINISHES, SPECTROSCOPY, ENGINE COMPONENTS, REPRINTS, ELECTRICAL CONDUCTIVITY
Field(s)/Group(s):
Metallurgy and Metallography, Electricity and Magnetism
Keyword(s):
RESIDUAL STRESS PROFILING, SURFACE TREATMENT, PIEZORESISTIVITY
Report Date:
2009 Jun 01
Creation Date:
2010 Mar 24