Skip to main content

Research Repository

Advanced Search

All Outputs (33)

Debris expulsion as a rate determining process in fretting – The effect of slip amplitude on debris expulsion behaviour and rates (2023)
Journal Article

In contrast to the well-established understanding of sliding wear, recent work has clearly demonstrated that the instantaneous wear rate in fretting of metals is dependent upon the contact size due to the fact that transport of species in and out of... Read More about Debris expulsion as a rate determining process in fretting – The effect of slip amplitude on debris expulsion behaviour and rates.

On the Microstructural Evolution and Failure Mechanism in Laser Powder Bed Fusioned Ti-6Al-4V during Low Cycle Fatigue at Room and Elevated Temperatures (2022)
Journal Article

Microstructural features and their evolution during cyclic deformation directly impact the low cycle fatigue (LCF) life of additively manufactured Laser Powder Bed Fusion (LPBF) Ti-6Al-4V. Tensile and strain controlled LCF tests were performed at roo... Read More about On the Microstructural Evolution and Failure Mechanism in Laser Powder Bed Fusioned Ti-6Al-4V during Low Cycle Fatigue at Room and Elevated Temperatures.

Numerical and Experimental Analysis of the Deformation Behavior of CoCrFeNiMn High Entropy Alloy Particles onto Various Substrates During Cold Spraying (2022)
Journal Article

The bonding mechanisms of a wide range of metallic materials in cold spraying have been studied, mainly attributed to adiabatic shear instability (ASI) at high strain rates, whereas the impact and deformation behavior of high entropy alloys (HEAs) on... Read More about Numerical and Experimental Analysis of the Deformation Behavior of CoCrFeNiMn High Entropy Alloy Particles onto Various Substrates During Cold Spraying.

A computationally efficient method for the prediction of fretting wear in practical engineering applications (2021)
Journal Article

A method for simulating fretting wear using the Modified Simplex Method for a contact solution has been developed. The initial separation between two contacting bodies was used as an input to solve the contact force distribution. An average cycle pre... Read More about A computationally efficient method for the prediction of fretting wear in practical engineering applications.

Understanding and modelling wear rates and mechanisms in fretting via the concept of rate-determining processes - Contact oxygenation, debris formation and debris ejection (2021)
Journal Article

A new framework which describes the role of three key processes in fretting wear of metals is proposed, with these three processes being: (i) oxygen transport into the contact; (ii) formation of oxide-based wear debris in the contact and (iii) ejecti... Read More about Understanding and modelling wear rates and mechanisms in fretting via the concept of rate-determining processes - Contact oxygenation, debris formation and debris ejection.

Interaction of displacement amplitude and frequency effects in fretting wear of a high strength steel: Impact on debris bed formation and subsurface damage (2021)
Journal Article

In previous work, fretting frequency has been observed to have a significant impact not only on wear rates, but also on the nature of fretting debris and the development of subsurface damage; however, while the “frequency effect” has been shown in so... Read More about Interaction of displacement amplitude and frequency effects in fretting wear of a high strength steel: Impact on debris bed formation and subsurface damage.

Signal-based analysis of the dynamic behaviour of the system in inertia friction welding and its impact on part contact evolution (2021)
Journal Article

Inertia friction welding (IFW) is a process used to create joints with high geometrical accuracy and near net shape form. To cope with the complex phenomena occurring during welding, the majority of available studies have analysed the interaction of... Read More about Signal-based analysis of the dynamic behaviour of the system in inertia friction welding and its impact on part contact evolution.

A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks (2020)
Journal Article

© 2020 The Authors Fretting fatigue can significantly reduce the life of components, leading to unexpected in-service failures. This phenomenon has been studied for over a century, with significant progress being made during the past decade. There ar... Read More about A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks.

A novel numerical method to predict the transient track geometry and thermomechanical effects through in-situ modification of the process parameters in Direct Energy Deposition (2019)
Journal Article

© 2019 Elsevier B.V. Direct Energy Deposition (DED) is being widely used to repair damaged components to increase service life and economical operation. Process parameters including laser power, traverse speed and the mass flowrate of the feedstock m... Read More about A novel numerical method to predict the transient track geometry and thermomechanical effects through in-situ modification of the process parameters in Direct Energy Deposition.

An Automated Inverse Method to Calibrate Thermal Finite Element Models for Numerical Welding Applications (2019)
Journal Article

Numerical modelling of welding processes is often completed using a sequentially coupled FE thermo-mechanical analysis to predict both the thermal and mechanical effects induced by the process. The accuracy of the predicted residual stresses and dist... Read More about An Automated Inverse Method to Calibrate Thermal Finite Element Models for Numerical Welding Applications.

The effect of frequency on both the debris and the development of the tribologically transformed structure during fretting wear of a high strength steel (2019)
Journal Article

It is well established that damage to the first bodies in fretting wear gives rise to a hard and brittle tribologically transformed structure (TTS) which can influence both wear and fatigue. While the existence and significance of TTS has been establ... Read More about The effect of frequency on both the debris and the development of the tribologically transformed structure during fretting wear of a high strength steel.

A holistic inverse approach based on a multi-objective function optimisation model to recover elastic-plastic properties of materials from the depth-sensing indentation test (2019)
Journal Article

Recent years have seen an increased interest in the mechanical characterisation of materials via the inverse analysis of depth-sensing indentation data; however, at low-loads both the reaction forces measured by the instrument and the contact evoluti... Read More about A holistic inverse approach based on a multi-objective function optimisation model to recover elastic-plastic properties of materials from the depth-sensing indentation test.