Evaluation of Residual Stresses, Grinding Burns and Heat Treat Defects Through Chrome Plating 880877
Determining residual stresses and detecting material defects through coatings is difficult with conventional testing techniques. X-ray diffraction can be used for residual stress determination on bare surfaces of a variety of materials, but fails to give any indication of stress in the underlaying metal through coatings. Nital etching cannot be used to detect grinding burns unless coating is removed. To overcome these difficulties, magnetic Barkhausen noise technique was used to study the feasibility of determining stresses and detecting grinding burns and heat treat defects through chrome plating.
Test results suggest that the sensitivity of Barkhausen noise technique to defects and residual stresses through chrome is excellent up to plating thicknesses of 0.012 in. (0.3 mm). This technique can replace the presently used procedures to determine stress and to detect material defects through coatings.
Citation: Tiitto, K. and Fix, R., "Evaluation of Residual Stresses, Grinding Burns and Heat Treat Defects Through Chrome Plating," SAE Technical Paper 880877, 1988, https://doi.org/10.4271/880877. Download Citation
Author(s):
K. Tiitto, R. Fix
Affiliated:
American Stress Technologies, Inc. Pittsburgh, PA
Pages: 12
Event:
Annual Aerospace/Airline Plating and Metal Finishing Forum and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE Transactions Journal of Aerospace-V97-1
Related Topics:
Heat treatment
Plating
Coatings, colorants, and finishes
Magnetic materials
Metals
Noise
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