420 Thickness Effect of Inter Layer on Fatigue Behavior in A5052 Aluminum Alloy with DLC/Thermally Sprayed WC-12Co Hybrid Coatings

Rotating bending fatigue tests had been performed using A5052 aluminum (Al) alloy with the hybrid coatings which consisted of tungsten carbide including 12% cobalt (WC-12Co) interlayer and diamond-like carbon (DLC) film, in order to investigate the effect of hybrid coating on the fatigue behavior. The WC-12Co layer was thermally sprayed by a high velocity oxygen fuel (HVOF) method on A5052 with the thickness of 70, 120 or 170μm. Subsequently, the DLC film was deposited with the thickness of 15μm. The fatigue strengths of the specimens with WC-12Co single layer were higher than those of the substrate and increased with increasing the thickness of WC-12Co layer. The fatigue strengths of the specimens with the hybrid coating of 70μm WC-12Co interlayer and 15μm DLC film were better than those of the specimen with 70μm WC-12Co single layer. Thus the hybrid coating structure was effective to improve fatigue strengths. However the beneficial effect of hybrid coating was not apparent in the specimens with thicker WC-12Co interlayer of 120 and 170μm.

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Effect of the welding profile generated by the modified indirect electric arc technique on the fatigue behavior of 6061-T6 aluminum alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2009.11.044 ◽

2010 ◽

Vol 527 (7-8) ◽

pp. 2057-2064 ◽

Cited By ~ 20

Author(s):

R.R. Ambriz ◽

G. Mesmacque ◽

A. Ruiz ◽

A. Amrouche ◽

V.H. López

Keyword(s):

Aluminum Alloy ◽

Fatigue Behavior ◽

Electric Arc

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On estimating axial high cycle fatigue behavior by rotating beam fatigue testing: Application to A356 aluminum alloy castings

Materials Science and Engineering A ◽

10.1016/j.msea.2017.05.008 ◽

2017 ◽

Vol 697 ◽

pp. 95-100 ◽

Cited By ~ 6

Author(s):

Hüseyin Özdeş ◽

Murat Tiryakioğlu ◽

Paul D. Eason

Keyword(s):

Aluminum Alloy ◽

High Cycle Fatigue ◽

Fatigue Testing ◽

Fatigue Behavior ◽

Cycle Fatigue ◽

A356 Aluminum Alloy ◽

Rotating Beam ◽

Alloy Castings ◽

A356 Aluminum

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Fatigue behavior of a thermally sprayed low carbon steel coating

Materials Science and Engineering A ◽

10.1016/s0921-5093(99)00558-4 ◽

2000 ◽

Vol 277 (1-2) ◽

pp. 176-182 ◽

Cited By ~ 5

Author(s):

Pi Lin Liu ◽

Jian Ku Shang ◽

Oludele O Popoola

Keyword(s):

Carbon Steel ◽

Fatigue Behavior ◽

Low Carbon Steel ◽

Low Carbon ◽

Steel Coating ◽

Thermally Sprayed

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The Effect of HFPD Thermally Sprayed WC-Co Coatings on the Fatigue Behavior and Deformation of Al 2024-T4

Thermal Spray 2000: Proceedings from the International Thermal Spray Conference ◽

10.31399/asm.cp.itsc2000p1297 ◽

2000 ◽

Author(s):

A. Ibrahim ◽

C.C. Berndt

Keyword(s):

High Frequency ◽

High Cycle Fatigue ◽

Fatigue Behavior ◽

Cycle Fatigue ◽

Pulse Detonation ◽

Deformation Behaviors ◽

Life Distributions ◽

Thermally Sprayed ◽

Al 2024 ◽

Frequency Pulse

Abstract The effect of high frequency pulse detonation (HFPD) and HVOF thermally sprayed WC-Co coatings on the high cycle fatigue (HCF) behavior of 2024-T4 aluminum was investigated. The fatigue life distributions of specimens in the polished and coated conditions are presented as a function of the probability of failure. The monotonic and cyclic deformation behaviors of the as-received and as-coated specimens were investigated. The conclusions show that, (i) the HFPD sprayed specimens exhibited slightly higher fatigue lives compared to the uncoated specimens, (ii) the HVOF sprayed specimens exhibited significantly higher fatigue lives compared to the uncoated specimens, and (iii) the as-coated specimen was cyclically stable.

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Effect of machine hammer peening on the surface integrity of a ZnAl-based corrosion protective coating

MATEC Web of Conferences ◽

10.1051/matecconf/202031801008 ◽

2020 ◽

Vol 318 ◽

pp. 01008

Author(s):

Alina Timmermann ◽

Mohamed Abdulgader ◽

Leif Hagen ◽

Alexander Koch ◽

Philipp Wittke ◽

...

Keyword(s):

Corrosion Fatigue ◽

Surface Integrity ◽

Protective Coatings ◽

Fatigue Behavior ◽

Turbine Blades ◽

Fatigue Properties ◽

Machine Hammer Peening ◽

Coated Surfaces ◽

Thermally Sprayed ◽

Hammer Peening

Thermally sprayed protective coatings are applied onto many mechanically stressed components such as support structures, shafts, turbine blades or heat exchangers. In addition to the static or cyclic load, a superimposition with corrosion processes occurs in many cases. Thermal sprayed ZnAl coatings are known for their performant corrosion protection properties. Within this context, the potential of ZnAl-based layer systems was analyzed regarding corrosion fatigue behavior. Therefore, a timeand cost-efficient testing strategy based on a corrosion-superimposed load increase procedure was used to estimate the effects of a corrosive attack during cyclic loading. The investigated coating systems were thermally sprayed and partially post-processed with a Machine Hammer Peening (MHP) operation. This treatment was identified as an appropriate technique for compressing and smoothing coated surfaces. The inter-relationships between the parametrization of the MHP process, the resulting surface integrity, and the estimated corrosion fatigue properties were analyzed. The investigations indicate a positive effect of MHP post-processing operations on the surface properties of the ZnAl-based coating system.

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The effect of the thickness on structural, optical limiting, and dielectric properties of hybrid coatings rhodamine B dye films on an epoxy polymeric substrate for display applications

Physica Scripta ◽

10.1088/1402-4896/ac3a50 ◽

2021 ◽

Author(s):

Wissal Jilani ◽

Abdelfatteh Bouzidi ◽

Albandary Almahri ◽

Hajer Guermazi ◽

Ibrahim Yahia

Keyword(s):

Dielectric Properties ◽

Rhodamine B ◽

Laser Power ◽

Thickness Effect ◽

Hybrid Coatings ◽

Laser Dye ◽

Polymeric Substrate ◽

Coating Films ◽

Dielectric Parameters ◽

Intensity Effect

Abstract Various thickness of Rhodamine B (RhB) laser dye was deposited on epoxy polymeric as a new dielectric organic substrate by spin coating method for the first time. This study focused on the newly considered RhB dye on an epoxy substrate for wide-scale applications. The thickness effect on structural, optical, and dielectric properties of the hybrid coating films was performed. The XRD patterns of the films indicated a large hump amorphous design and lack of Bragg peak intensity associated with the RhB laser dye, due to amorphous film concentration. From UV-Visible spectroscopy, the optical absorption edge shifts to the higher wavelengths direction (redshift) with the variation in RhB dye thicknesses. It was found that the energy band gap decreased when the RhB dye film thickness changed. The refractive index is an important parameter influencing the optical component design. Their values vary according to each relationship that extremely useful the films in optical devices. Laser power attenuation sensitivity of pure epoxy polymeric substrate and its coating films shows that under reducing the thicknesses of RhB dye, the laser power intensity effect increases. Several dielectric parameters are extracted from the series and parallel capacitance measurements. The present results offer new material films for luminescent energy solar concentrator applications.

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