Discussion on “Interfacial Residual Stress Analysis of Thermal Spray Coatings by Miniature Ring-Core Cutting Combined with DIC Method” by J.G. Zhu et al., Experimental Mechanics DOI:10.1007/s11340-012-9640-2

2014 ◽  
Vol 54 (7) ◽  
pp. 1305-1306
Author(s):  
M. Sebastiani ◽  
A. M. Korsunsky ◽  
C. Eberl ◽  
E. Bemporad ◽  
G. M. Pharr
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Experimental Mechanics ◽  
Spray Coatings ◽  
Residual Stress Analysis ◽  
Ring Core

Interfacial Residual Stress Analysis of Thermal Spray Coatings by Miniature Ring-Core Cutting Combined with DIC Method

2012 ◽  
Vol 54 (2) ◽  
pp. 127-136 ◽  
Author(s):  
J. G. Zhu ◽  
H. M. Xie ◽  
Y. J. Li ◽  
Z. X. Hu ◽  
Q. Luo ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Analysis ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Spray Coatings ◽  
Residual Stress Analysis ◽  
Ring Core

Modeling Residual Stress Development in Thermal Spray Coatings: Current Status and Way Forward

2017 ◽  
Vol 26 (6) ◽  
pp. 1115-1145 ◽  
Author(s):  
Abba A. Abubakar ◽  
Abul Fazal M. Arif ◽  
Khaled S. Al-Athel ◽  
S. Sohail Akhtar ◽  
Javad Mostaghimi
Keyword(s):  
Residual Stress ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Current Status ◽  
Stress Development ◽  
Spray Coatings

Fatigue Life in Bending and Coatings Residual Stress in Tungsten Carbide Thermal Spray Coatings

1997 ◽  
Author(s):  
R.T.R. McGrann ◽  
J.R. Shadley ◽  
E.F. Rybicki ◽  
D.J. Graving ◽  
B.E. Badger ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Tungsten Carbide ◽  
Thermal Spray ◽  
Thermal Spray Coatings ◽  
Chrome Plating ◽  
Spray Coatings ◽  
Wear Protection ◽  
Carbide Coatings ◽  
Flat Beam

Abstract Tungsten caibide (WC) thermal spray coatings are being used for wear protection on selected components of aircraft. Tungsten carbide coatings are being used on aircraft flap tracks and fan and compressor blade mid-span dampers. However, a larger use of tungsten carbide coatings is being considered for other commercial aircraft applications where it would be used as a replacement for chrome plating. For instance, WC coatings are currently being tested on aircraft landing gear parts. One factor that affects the suitability of WC coatings for these applications is the fatigue life of the coated part. Coatings, whether chrome plating or thermal spray coating, can reduce the fatigue life of the part compared to an uncoated part. This study compares the fatigue life of uncoated 6061 aluminum specimens to the fatigue life of WC thermal sprayed coated 6061 aluminum specimens. The relation between the residual stress level in the coating and the fatigue life of the specimens is also investigated. Fatigue tests were run on cantilever flat beam specimens that were coated on one side. Specimens were cycled in bending so that the coatings experienced tensile fatigue stresses. Residual stress levels for each type of coating were determined using the Modified Layer Removal Method on specimens processed along with the cantilever flat beam specimens. Test results show that the fatigue life of the WC coated specimens is directly related to the level of compressive residual stress in the coating.

Variation in Residual Stress Field During Fatigue Failure of Thermal Spray Coatings

2000 ◽  
Author(s):  
R. Ahmed ◽  
M. Hadfield ◽  
S. Tobe
Keyword(s):  
Residual Stress ◽  
Thermal Spray ◽  
Fatigue Failure ◽  
Contact Stress ◽  
Rolling Direction ◽  
Rolling Contact ◽  
Thermal Spray Coatings ◽  
Residual Stress Field ◽  
Stress Measurements ◽  
Spray Coatings

Abstract A non-destructive experimental approach was adapted to investigate the variations in residual stress fields within thermal spray coatings. WC-Co coatings produced by a HVOF technique were considered for concentrated rolling sliding contacts in this study. These coatings were produced in various thicknesses on various substrates. Residual stress measurements were made using an x-ray diffraction technique, along and across the rolling direction. A modified four-ball machine was used to conduct rolling contact fatigue tests under various tribological conditions of contact stress, lubrication and contact configuration. Residual stress measurements were made before and after the tribological tests. Failed rolling elements were analyzed using scanning electron microscopy, electron probe microscopy and surface interferometry. Results indicate that the magnitude of compressive residual stress attenuates during fatigue failure. The magnitude of attenuated residual stress was dependent upon the type of tribological failure. This attenuation of residual stress was attributed to the microcracking of coating under the influence of contact stress.

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