3D finite element study of the fatigue damage of Ti–6Al–4V in presence of fretting wear

Cold spray (CS) coating technique is being studied as a potential solution for repairing aircraft Ti-6Al-4V components. This work is focused on the restoration of damaged components due to wear induced by vibrations. It is known that Ti-6Al-4V CS deposition shows difficulties to obtain non-porous coatings due to the high strength of this material, that is detrimental for wear resistance. In this sense, performing a post-heat treatment leads to lower porosity CS Ti-6Al-4V coatings and improves their mechanical properties, and thus, a better tribological behaviour is also expected. Therefore, the objective of this study was to determine the effect of a post-heat treatment on the wear resistance of Ti-6Al-4V coatings deposited by the CS technique. Ti-6Al-4V CS coatings were used, which have been sprayed with nitrogen as process gas at a temperature of 1100 °C and a pressure of 50 bar. The coatings were subjected to a solution heat treatment followed by a precipitation heat treatment. Oscillating and unidirectional sliding wear experiments were conducted on the coatings at room temperature and at 450 °C. A pin on disc configuration was used with a bearing steel counterbody. The 2 results were compared to those obtained on the substrate (which represents the material to be repaired) and on the as-sprayed coating, which were derived from a previous work. The heat treated coating presented improved wear behaviour as compared to the substrate as well as to the as-sprayed coating, particularly during the high temperature tests. Wear at high temperature was dominated by material transference from the counterbody to the Ti-6Al-4V coating.

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“…Additionally, the damage induced by vibration, i.e. wear by fretting, has been also reported in previous works [6].…”

Section: Introductionsupporting

confidence: 69%

Improving the oscillating wear response of cold sprayed Ti-6Al-4V coatings through a heat treatment

Sirvent

Garrido

Sharp

et al. 2020

Surface and Coatings Technology

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“…Simulations of surface damages caused by contact fatigue are quite different from those of adhesive and abrasive wear. Numerous numerical schemes have been implemented for predicting fatigue wear, but a common strategy involves calculations of an equivalent stress that consists of normal/shear stress and strain, and a certain fatigue model, that relate the equivalent stress with the number of cycles to crack initiation and failure [672,673]. In this approach, the mutual influences between fretting wear and fretting fatigue have been investigated [674].…”

Section: Other Developments and Applicationsmentioning

confidence: 99%

A review of recent advances in tribology

et al. 2020

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The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade. This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years. Different aspects of tribology that have been reviewed including lubrication, wear and surface engineering, biotribology, high temperature tribology, and computational tribology. This review attempts to highlight recent research and also presents future outlook pertaining to these aspects. It may however be noted that there are limitations of this review. One of the most important of these is that tribology being a highly multidisciplinary field, the research results are widely spread across various disciplines and there can be omissions because of this. Secondly, the topics dealt with in the field of tribology include only some of the salient topics (such as lubrication, wear, surface engineering, biotribology, high temperature tribology, and computational tribology) but there are many more aspects of tribology that have not been covered in this review. Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.

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“…Not included in this investigation is the effect of wear, which can have an impact on the lifetime of components subjected to fretting fatigue, depending on the slip-stick conditions. Past researches [24,61] show that under partial slip conditions there is relatively little wear and fretting damage increases, with a high risk of cracking at the contact edges due to stress concentrations. On the other hand, under gross slip conditions, wear suppresses early crack initiation and transforms the surface, which results in stress redistribution and increased fretting fatigue lifetimes.…”

Section: Lifetime Estimationmentioning

confidence: 99%

Numerical modelling of microstructure inhomogeneity to reproduce experimentally observed scatter in fretting fatigue lifetimes

Glodek

Nazabal

Llavori

et al. 2023

Tribology International

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3D finite element study of the fatigue damage of Ti–6Al–4V in presence of fretting wear

Cited by 7 publications

References 33 publications

Improving the oscillating wear response of cold sprayed Ti-6Al-4V coatings through a heat treatment

Improving the oscillating wear response of cold sprayed Ti-6Al-4V coatings through a heat treatment

A review of recent advances in tribology

Numerical modelling of microstructure inhomogeneity to reproduce experimentally observed scatter in fretting fatigue lifetimes

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