Characterization of fretting wear behavior of Cu–Al coating on Ti–6Al–4V substrate

Lee, Hyukjae; Mall, S.; Sanders, J.H.; Sharma, S. K.; Magaziner, Russell S.

doi:10.1016/j.triboint.2007.02.006

Cited by 19 publications

(4 citation statements)

References 18 publications

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“…Maximum crack size after 100,000 cycles from fretting alone, comparing untreated and shotpeened surfaces [7]. loops) [134,135]. Results on improving fretting fatigue have been mixed [132,133].…”

Section: Coatings and Diffusionmentioning

confidence: 99%

The Fretting Fatigue Behavior of Ti-6Al-4V

Neu

2008

KEM

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Abstract. This paper reviews the understanding of fretting fatigue with an emphasis on the behavior of Ti-6Al-4V. Advances in life prediction and assessment approaches are highlighted. The role of microstructure on fretting fatigue and its use to detect fretting fatigue damage can now be considered in assessment strategies. Various palliatives are used to enhance the fretting fatigue resistance. These include treatments to introduce compressive residual stress and surface coatings that reduce friction and/or protect the underlying structural material. IntroductionThis paper reviews the tremendous progress over the past decade to understand and predict the fretting fatigue behavior of Ti-6Al-4V, a common alloy used in applications requiring high specific strength. Fretting fatigue is of particular concern for dovetail attachments between the blades and disks in compressors of aerospace gas turbines, spline couplings of shafts, and mechanical joints in orthopedic implants. In the past decade there has been considerable focus on the fretting fatigue behavior of the duplex microstructure consisting of 60 vol. % equiaxed primary α (hcp structure) and 40 vol. % secondary lamellar α+β domains about 10 to 15 µm in size composed of alternating lathes of α and bcc-structured β. This was the baseline microstructure used for several projects carried out under the Air Force High Cycle Fatigue (HCF) program from 1995 to 2005 [1,2]. Unless noted otherwise, the majority of the data reported in this review was generated on this or similar microstructure. The microstructure has an initial random texture with yield strength 930 MPa, ultimate tensile strength 978 MPa, and cyclic yield strength of 797 MPa [1].The fretting fatigue process can be divided into two parts. The first is the formation of fretting cracks and the second is the growth of fretting fatigue cracks. The drivers for each of these processes are different. Both processes must occur to realize a catastrophic fretting fatigue failure. If fretting cracks do not form, fretting fatigue will not occur. But even if fretting cracks form, a catastrophic fretting fatigue failure will not occur if these cracks do not grow outside of the fretting fatigue process volume (FFPV) associated with the formation of the crack. Hence, the fretting fatigue limit is associated with the threshold limit for propagating the fretting cracks. In most fretting fatigue experiments and in applications, the drivers for fretting crack formation and crack growth outside of the FFPV cannot be easily separated, so there is an apparent coupling between the two. However, experiments involving the independent control of the drivers for fretting crack formation and crack growth (e.g., [3,4]) suggest that these two processes can be separated for the purposes of material response and prediction analyses. This is extremely helpful in understanding how different palliatives mitigate the fretting drivers. Some palliatives are aimed at fretting crack formation while others at reducing the fretting fatigue crack...

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Section: Coatings and Diffusionmentioning

confidence: 99%

The Fretting Fatigue Behavior of Ti-6Al-4V

Neu

2008

KEM

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“…6 To seek countermeasures against fretting damage in the dovetail joints of gas turbine engines, a soft CuAl alloy coating prepared by atmosphere plasma spraying (APS) has been used as a palliative for the reason that as-sprayed CuAl alloy coating could act as a solid lubricant by lowering friction at the contact surface and then alleviate fretting fatigue. 7,8 During spraying, CuAl alloy powder is injected into the ionized gas and intensely heated to form molten or semi-molten droplets that are accelerated and crashed onto a preheated coarsened surface generating lamellar structure during the spread and solidification of droplets. Benefiting from the ultrahigh cooling rate of molten droplets in APS technology, which can reach up to 10 6 K/s, 9 the brittle 00 phase can be avoided, which is often inevitable in other processes (such as cast or wrought) due to limited cooling rate.…”

Section: Introductionmentioning

confidence: 99%

Influence of phase composition on fretting wear behavior of thermally sprayed aluminum bronze coatings

Yang

Zhao

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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Single -phase and duplex (þ 0 ) phase aluminum bronze (CuAl) coatings were deposited on 1Cr18Ni9Ti stainless steels by atmosphere plasma spray. The fretting wear behaviors of the two types of coatings were investigated in relation to their phase composition. The damage mechanisms of the coatings were identified by analysing their worn surfaces using scanning electron microscopy and three-dimensional non-contact surface profiler. A discussion about the identified fretting damage mechanisms was carried out. Results show that duplex CuAl coating has higher hardness than the single a-phase CuAl coating but the former has poorer resistance against fretting wear than the latter in mixed stick-slip regime and gross slip regime. The toughness reduction due to the dendritic distribution of the 0 phase in duplex CuAl coating could explain the low fretting wear resistance observed in the duplex coating. In stick regime, single a-phase CuAl coating has a lower friction coefficient but it has a higher wear rate than the duplex coating, which is attributed to the lower hardness and hence more severe plastic deformation.

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“…Many studies show that using surface protection technology to pretreatment the surface of components is an effective way to alleviate fretting damage [6][7][8]. Electroless plating as a kind of surface protection technology with the feature of well adaptable, easy to operate, good dense of coating and higher hardness has been widely used [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Process Optimization of Ni-Tl-B Coating with Fretting Damage Resistance

Song

Yang

2010

AMR

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Electroless plating technology used to alleviate fretting damage of titanium alloy was studied, Ni-Tl-B coatings were prepared, process optimization was worked out by the orthogonal table, deposition rate and solution consumption per hour and the initial friction coefficient and the bearing cycles under a low friction coefficient were chose as the index to calculate the range according to the economical efficiency and the application of coating under the surface morphology analysis and the fretting friction coefficient test, optimum process was finally worked out. Surface morphology was analyzed by TM-1000 scanning electron microscope and the fretting friction coefficient was tested by the DELTALAB-NENE fretting wear tester. The results shows that the surface morphology of the Ni-Tl-B coating are all typical cell structure which will be slightly different when the process changes and the optimum Ni-Tl-B coating has outstanding fretting damage resistance.

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Characterization of fretting wear behavior of Cu–Al coating on Ti–6Al–4V substrate

Cited by 19 publications

References 18 publications

The Fretting Fatigue Behavior of Ti-6Al-4V

The Fretting Fatigue Behavior of Ti-6Al-4V

Influence of phase composition on fretting wear behavior of thermally sprayed aluminum bronze coatings

Preparation and Process Optimization of Ni-Tl-B Coating with Fretting Damage Resistance

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