The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6 ) steel

Zhang, Deen; Harris, S. J.; McCartney, D.G.; Pashby, I.R.; Powell, J.; Shipway, P.H.; Voisey, K.T.

doi:10.1016/j.msea.2007.12.040

Evolution of plasticity-based wear damage in gross sliding fretting of a Ti-6Al-4V non-conforming contact (2017)
Journal Article
Mohd Tobi, A., Sun, W., & Shipway, P. (in press). Evolution of plasticity-based wear damage in gross sliding fretting of a Ti-6Al-4V non-conforming contact. Tribology International, 113, https://doi.org/10.1016/j.triboint.2017.01.010

This paper examines the evidence for a plasticity based wear mechanism in the fretting wear of Ti-6Al-4V. Driven by near-surface plastic strain accumulation, the generation of wear debris evolves from coarse metallic debris towards loose fine oxide d... Read More about Evolution of plasticity-based wear damage in gross sliding fretting of a Ti-6Al-4V non-conforming contact.

Investigation on the plasticity accumulation of Ti-6Al-4V fretting wear by decoupling the effects of wear and surface profile in finite element modelling (2016)
Journal Article
Tobi, A. M., Sun, W., & Shipway, P. (in press). Investigation on the plasticity accumulation of Ti-6Al-4V fretting wear by decoupling the effects of wear and surface profile in finite element modelling. Tribology International, https://doi.org/10.1016/j.triboint.2016.12.009

A finite-element-based wear modelling methodology and a computational device for decoupling wear effects is presented in this study. The decoupling of wear effects facilitates the capture of plasticity accumulation on a particular wear-scarring profi... Read More about Investigation on the plasticity accumulation of Ti-6Al-4V fretting wear by decoupling the effects of wear and surface profile in finite element modelling.

A numerical methodology for predicting tool wear in Friction Stir Welding (2016)
Journal Article
Hasan, A., Bennett, C., Shipway, P., Cater, S., & Martin, J. (2017). A numerical methodology for predicting tool wear in Friction Stir Welding. Journal of Materials Processing Technology, 241, https://doi.org/10.1016/j.jmatprotec.2016.11.009

A novel methodology for predicting tool wear in FSW based on a CFD model, coupled with a modified Archard equation, is presented considering the effect of the deformation of the highly viscous flow around the tool on tool wear. A validation process... Read More about A numerical methodology for predicting tool wear in Friction Stir Welding.

A combined wear-fatigue design methodology for fretting in the pressure armour layer of flexible marine risers (2016)
Journal Article
O'Halloran, S., Shipway, P., Connaire, A., Leen, S. B., & Harte, A. (2017). A combined wear-fatigue design methodology for fretting in the pressure armour layer of flexible marine risers. Tribology International, 108, https://doi.org/10.1016/j.triboint.2016.10.020

This paper presents a combined experimental and computational methodology for fretting wear-fatigue prediction of pressure armour wire in flexible marine risers. Fretting wear, friction and fatigue parameters of pressure armour material have been cha... Read More about A combined wear-fatigue design methodology for fretting in the pressure armour layer of flexible marine risers.

The roles of contact conformity, temperature and displacement amplitude on the lubricated fretting wear of a steel-on-steel contact (2016)
Journal Article
Warmuth, A., Sun, W., & Shipway, P. (2016). The roles of contact conformity, temperature and displacement amplitude on the lubricated fretting wear of a steel-on-steel contact. Royal Society Open Science, 3(10), Article 150637. https://doi.org/10.1098/rsos.150637

This paper investigates the effect of contact geometry, temperature and displacement amplitude on the fretting behaviour of an aero-turbo oil lubricated cylinder-on-flat contact. To be effective, the lubricant needed both to penetrate the contact and... Read More about The roles of contact conformity, temperature and displacement amplitude on the lubricated fretting wear of a steel-on-steel contact.

Derivation of a wear scar geometry-independent coefficient of friction from fretting loops exhibiting non-Coulomb frictional behaviour (2016)
Journal Article
Jin, X., Sun, W., & Shipway, P. (2016). Derivation of a wear scar geometry-independent coefficient of friction from fretting loops exhibiting non-Coulomb frictional behaviour. Tribology International, 102, 561-568. https://doi.org/10.1016/j.triboint.2016.06.012

One source of variation of the sliding tractional force in a gross-slip fretting cycle is the geometrical interaction of the developing wear scars on the opposing specimens. An existing model has been developed to include the compliance of the fretti... Read More about Derivation of a wear scar geometry-independent coefficient of friction from fretting loops exhibiting non-Coulomb frictional behaviour.

The role of geometry changes and debris formation associated with wear on the temperature field in fretting contacts (2016)
Journal Article
Jin, X., Sun, W., & Shipway, P. (2016). The role of geometry changes and debris formation associated with wear on the temperature field in fretting contacts. Tribology International, 102, https://doi.org/10.1016/j.triboint.2016.05.043

The temperature of a fretting contact is known to be a key factor in its development. However, as a test proceeds, the wear scar changes, both geometrically and through the formation of oxide-based debris-beds. Accordingly, the effects of these on th... Read More about The role of geometry changes and debris formation associated with wear on the temperature field in fretting contacts.

A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries (2015)
Journal Article
Hasan, A., Bennett, C., & Shipway, P. (in press). A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries. Materials and Design, 87, https://doi.org/10.1016/j.matdes.2015.08.016

The tool is a key component in the Friction Stir Welding (FSW) process, but the tool degrades and changes shape during use; however, only a limited number of experimental studies have been undertaken in order to understand the effect that worn tool g... Read More about A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries.

The role of frictional power dissipation (as a function of frequency) and test temperature on contact temperature and the subsequent wear behaviour in a stainless steel contact in fretting (2015)
Journal Article
Jin, X., Shipway, P., & Sun, W. (2015). The role of frictional power dissipation (as a function of frequency) and test temperature on contact temperature and the subsequent wear behaviour in a stainless steel contact in fretting. Wear, 330-331, 103-111. https://doi.org/10.1016/j.wear.2015.02.022

Temperature is known to affect the fretting wear behaviour of metals; generally, a critical temperature is observed, above which there are substantial reductions in wear rate, with these being associated with the development of protective oxide beds... Read More about The role of frictional power dissipation (as a function of frequency) and test temperature on contact temperature and the subsequent wear behaviour in a stainless steel contact in fretting.

Fretting wear mapping: the influence of contact geometry and frequency on debris formation and ejection for a steel-on-steel pair (2015)
Journal Article
Warmuth, A. R., Shipway, P. H., & Sun, W. (2015). Fretting wear mapping: the influence of contact geometry and frequency on debris formation and ejection for a steel-on-steel pair. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 471(2178), https://doi.org/10.1098/rspa.2014.0291

This paper examines the influence of contact geometry and oscillation frequency in a steel cylinder-on-steel flat fretting contact, with contact geometry being varied via the cylinder radius. Fretting frequency did not significantly impact the wear b... Read More about Fretting wear mapping: the influence of contact geometry and frequency on debris formation and ejection for a steel-on-steel pair.

Is the wear coefficient dependent upon slip amplitude in fretting?: Vingsbo and Söderberg revisited (2014)
Journal Article
Pearson, S., & Shipway, P. (2014). Is the wear coefficient dependent upon slip amplitude in fretting?: Vingsbo and Söderberg revisited. Wear, 330, https://doi.org/10.1016/j.wear.2014.11.005

More than 25 years ago, Vingsbo and Söderberg published a seminal paper regarding the mapping of behaviour in fretting contacts (O. Vingsbo, S. Söderberg, On fretting maps, Wear, 126 (1988) 131–147). In this paper, it was proposed that in the gross-s... Read More about Is the wear coefficient dependent upon slip amplitude in fretting?: Vingsbo and Söderberg revisited.

The influence of surface hardness on the fretting wear of steel pairs: its role in debris retention in the contact (2014)
Journal Article
Lemm, J., Warmuth, A., Pearson, S., & Shipway, P. (2014). The influence of surface hardness on the fretting wear of steel pairs: its role in debris retention in the contact. Tribology International, 81, https://doi.org/10.1016/j.triboint.2014.09.003

The influence of specimen hardness (between 275 kgf mm−2 and 835 kgf mm−2) in an AISI Type O1 steel-on-steel fretting contact was examined. In equal-hardness pairs, a variation in the wear volume of around 20% across the range of hardnesses examined... Read More about The influence of surface hardness on the fretting wear of steel pairs: its role in debris retention in the contact.

The effect of temperature on wear and friction of a high strength steel in fretting (2013)
Journal Article
Pearson, S., Shipway, P., Abere, J., & Hewitt, R. (2013). The effect of temperature on wear and friction of a high strength steel in fretting. Wear, 303(1-2), https://doi.org/10.1016/j.wear.2013.03.048

This paper investigates the effect of temperature (between 24 °C and 450 °C) on the wear rate and friction coefficient of a high strength alloy steel (Super-CMV) in gross sliding fretting in air. It was found that whilst there was significant loss of... Read More about The effect of temperature on wear and friction of a high strength steel in fretting.

Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type (2011)
Journal Article
Kamdi, Z., Shipway, P., Voisey, K., & Sturgeon, A. (2011). Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type. Wear, 271(9-10), https://doi.org/10.1016/j.wear.2010.12.060

Abrasive wear behaviour of materials can be assessed using a wide variety of testing methods, and the relative performance of materials will tend to depend upon the testing procedure employed. In this work, two cermet type coatings have been examined... Read More about Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type.

The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6 ) steel (2008)
Journal Article
Zhang, D., Harris, S. J., McCartney, D., Pashby, I., Powell, J., Shipway, P., & Voisey, K. (2008). The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6 ) steel. Materials Science and Engineering: A, 489(1-2), https://doi.org/10.1016/j.msea.2007.12.040

A high carbon (C70S6) steel has been laser surface treated using CO2 and Diode lasers in order to produce an embrittled region to act as a fracture notch. Such a process has been investigated as a precursor to the fracture splitting of automotive eng... Read More about The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6 ) steel.

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