All Outputs (4)

Ambient grain orientation imaging on complex surfaces (2023)
Journal Article
Speidel, A., Bisterov, I., Ahmed, S., & Clare, A. T. (2024). Ambient grain orientation imaging on complex surfaces. Acta Materialia, 265, Article 119604. https://doi.org/10.1016/j.actamat.2023.119604

Crystal orientation imaging is generally confined to the laboratory, typically following destructive sectioning, with most current techniques reliant on electron-material interactions that require a vacuum. This information is gathered in a manner th... Read More about Ambient grain orientation imaging on complex surfaces.

Electrolytic-dielectrics: A route to zero recast electrical discharge machining (2022)
Journal Article
Ahmed, S., Speidel, A., Murray, J. W., Ahmed, N., Cuttell, M., & Clare, A. T. (2022). Electrolytic-dielectrics: A route to zero recast electrical discharge machining. International Journal of Machine Tools and Manufacture, 181, Article 103941. https://doi.org/10.1016/j.ijmachtools.2022.103941

Electrical discharge machining (EDM) is a widely used manufacturing process for machining hard or high melting point metals. A characteristic feature of this process is a brittle, porous and rough recast layer on machined surfaces, which undermines i... Read More about Electrolytic-dielectrics: A route to zero recast electrical discharge machining.

A dual material removal mechanism for clearing of obstructed holes via electrical discharge machining (2021)
Journal Article
Castro-Palacios, M., Ahmed, S., Ahmed, N., Murray, J. W., Speidel, A., Duffin, J., …Clare, A. T. (2022). A dual material removal mechanism for clearing of obstructed holes via electrical discharge machining. Manufacturing Letters, 31, 10-14. https://doi.org/10.1016/j.mfglet.2021.12.003

Cooling hole blockages in gas turbine blades can occur during operation, detrimentally reducing performance and resulting in premature removal from service. Here, electrical discharge machining (EDM) is used to unblock fine holes, which have been obs... Read More about A dual material removal mechanism for clearing of obstructed holes via electrical discharge machining.

Observation of EDM plasma behavior influenced by parasitic working gap capacitance (2020)
Journal Article
Petersen, T., Ahmed, S., Kunieda, M., & Klink, A. (2020). Observation of EDM plasma behavior influenced by parasitic working gap capacitance. Procedia CIRP, 95, 189-194. https://doi.org/10.1016/j.procir.2020.01.198

Machining large surfaces to good surface qualities is currently difficult, as optimisation of parameters does not always lead to a satisfactory outcome. This appears to be an issue with traditional EDM, and the cause is not understood very well. Obse... Read More about Observation of EDM plasma behavior influenced by parasitic working gap capacitance.