Katy Voisey

Contact

• workRoom A30a Coates
  University Park
  Nottingham
  NG7 2RD
  UK
• work0115 951 4139
• fax0115 951 3800
• katy.voisey@nottingham.ac.uk

Expertise Summary

• Laser cutting.
• Laser surface modification: laser melting, laser alloying of preplaced coatings, laser texturing, laser induced solid state transformations, laser modification of coatings.
• Corrosion testing.
• Performance and modification of thermally sprayed corrosion resistant coatings.
• Effects of microstructural modifications on corrosion performance.

Research Summary

Katy Voisey's current research covers the three areas of laser materials processing, corrosion and overlay coatings. The underlying theme is the relation between microstructural modifications and… read more

Recent Publications

• M. HASHEMZADEH, K. T. VOISEY and M. KAZEROONI, 2012. The effects of low-frequency workpiece vibration on low-power CO2 laser cutting of PMMA: an experimental investigation The International Journal of Advanced Manufacturing Technology.
• M.S. BAKARE, K.T. VOISEY, K. CHOKETHAWAI and D.G. MCCARTNEY, 2012. Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10 Journal of Alloys and Compounds. 527, 210-218
• J. POWELL, S.O. AL-MASHIKHI, A.F.H. KAPLAN, K.T. VOISEY, 2011. Fibre laser cutting of thin section mild steel: An explanation of the‘striation free’ effect Optics and Lasers in Engineering. 49, 1069–1075
• KAMDIA, Z., SHIPWAY, P.H., VOISEY, K.T. and STURGEON, A.J., 2011. Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type Wear. 271, 1264-1272

• View all publications

Current Research

Katy Voisey's current research covers the three areas of laser materials processing, corrosion and overlay coatings. The underlying theme is the relation between microstructural modifications and material performance, proper understanding of this relationship enables material engineering techniques to be used to optimise material performance.

Fibre lasers are a relatively new type of laser that produce exceptionally high quality beams that can be focussed to produce very high power densities which are expected to enhance many areas of laser processing. Our current work on fibre laser cutting is increasing the understanding of this area and producing a number of publications.

Laser processing of materials uses the laser as a highly controllable heat source to modify materials by heating, inducing melting and solid state transformations. A key advantage of the laser is that highly localised heat treatments are possible, the material surface may be heat treated with minimal heat input to the bulk material. This is especially important in some coated systems where laser modification of the coating is required without thermal damage of the substrate. Laser surface melting can be used to seal porous thermally sprayed coating, improving their performance as a barrier to corrosive species. As well as eliminating porosity, laser melting generates rapidly solidified microstructures which have modified properties including corrosion performance and wear resistance. Laser surface alloying melts the entire thickness of a pre-placed coating together with a thin layer of the substrate, on resolidification a surface alloy is formed. The alloy composition can be controlled by laser processing parameters as well as the composition of the pre-placed coating. Deliberate and controlled microstructural modification by laser processing can mimic some of the microstructural features created by the thermal spraying coating deposition process. Laser microstructural modification is currently being used to help investigate the performance gap between some bulk and sprayed versions of corrosion resistant alloys.

Specific current research topics include:

• fibre laser cutting
• WC coatings
• microstructural evolution of MCrAlY coatings
• the effect of microstructural modifications on corrosion resistance
• laser induced phase transformations
• development of a laser based coating stripping process.

Past Research

Previous research interests include thermal barrier coatings, laser drilling, laser surface melting, laser alloying and high temperture corrosion.

Future Research

Planned future research interests are: laser peening; extension of current electrochemical measurement to include impedance spectroscopy; modelling of laser materials processing.

• M. HASHEMZADEH, K. T. VOISEY and M. KAZEROONI, 2012. The effects of low-frequency workpiece vibration on low-power CO2 laser cutting of PMMA: an experimental investigation The International Journal of Advanced Manufacturing Technology.
• M.S. BAKARE, K.T. VOISEY, K. CHOKETHAWAI and D.G. MCCARTNEY, 2012. Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10 Journal of Alloys and Compounds. 527, 210-218
• J. POWELL, S.O. AL-MASHIKHI, A.F.H. KAPLAN, K.T. VOISEY, 2011. Fibre laser cutting of thin section mild steel: An explanation of the‘striation free’ effect Optics and Lasers in Engineering. 49, 1069–1075
• KAMDIA, Z., SHIPWAY, P.H., VOISEY, K.T. and STURGEON, A.J., 2011. Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type Wear. 271, 1264-1272
• LEE JOHNSON, AKBAR NIAZ, ADRIAN BOATWRIGHT, K.T. VOISEY and DARREN A. WALSH, 2011. Scanning electrochemical microscopy at thermal sprayed anti-corrosion coatings: Effect of thermal spraying on heterogeneous electron transfer kinetics Journal of Electroanalytical Chemistry. 657, 46–53
• AL-MASHIKHI, S.O., POWELL, J., KAPLAN, A. and VOISEY, K.T., 2011. Heat affected zones and oxidation marks in fiber laser–oxygen cutting of mild steel Journal of Laser Applications. 23(4),
• S. SAEIDI, K.T. VOISEY and D.G. MCCARTNEY, 2011. Mechanical Properties and Microstructure of VPS and HVOF CoNiCrAlY Coatings Journal of Thermal Spray Technology. 20, 1231–1243
• KAMDI, Z, SHIPWAY, P.H., VOISEY, K.T. and STURGEON, A.J., 2010. Micro-scale abrasion behaviour of conventional and large-particle cermet coatings for hard chrome replacement In: Proceedings of the 14th Nordic Symposium on Tribology -Nordtrib 2010. Paper number : 0141
• BAKARE, M.S., BUTT, A.N., VOISEY, K.T. and MCCARTNEY, D.G., 2010. Microstructural Modifications and Corrosion Behaviour of HVOF Sprayed Coatings Using Laser Surface Melting – Inconel 625 and FeCrAlY In: Proceedings of Materials Science and Technology (MS&T) 2010. 296-306
• AHMED, A., VOISEY, K.T. and MCCARTNEY, D.G., 2010. Investigation into the effect of beam shape on melt pool characteristics using Optics and Lasers in Engineering. 48, 548-554
• AHMED, N., BAKARE, M.S., MCCARTNEY, D.G. and VOISEY, K.T., 2010. The effects of microstructural features on the performance gap in corrosion resistance between bulk and HVOF sprayed Inconel 625 Surface and Coatings Technology. 204, 2294-2301
• BAKARE, M.S., VOISEY, K.T., ROE, M.J. and MCCARTNEY, D.G., 2010. X-ray photoelectron spectroscopy study of the passive films formed on thermally sprayed and wrought Inconel 625 Applied Surface Science. 257, 786–794
• POWELL, J., PETRING D., KUMAR R.V., AL-MASHIKHI, S.O., KAPLAN A.F.H. and VOISEY K.T., 2009. Laser-oxygen cutting of mild steel: the thermodynamics of the oxidation reaction Journal of Physics D: Applied Physics. 42(1), 015504
• SAEIDI, S., VOISEY, K.T. and MCCARTNEY, D.G., 2009. The Effect of Heat Treatment on the Oxidation Behavior of HVOF and VPS CoNiCrAlY Coatings Journal of Thermal Spray Technology. 18(2), 209-216
• VOISEY, K.T., 2009. Metallic and Inorganic Coatings: Sprayed. In: RICHARDSON, J.A., COTTIS, R.A., LYON, S.B., SCANTLEBURY, J.D, STOTT, F.H and GRAHAM, M., eds., Shreir's Corrosion, Four-volume Set Elsevier.
• BAKARE, M.S., VOISEY, K.T, WALSH, D.A. and MCCARTNEY, D.G, 2009. The use of scanning electrochemical microscopy (SECM) to identify electrochemically active features in thermally sprayed Inconel 625 coatings In: EuroCorr, Nice, France, 6-10 September 2009.. paper no 8144
• AL-MASHIKHI, S.O., POWELL, J., KAPLAN, A.F.H. and VOISEY, K.T., 2009. An explanation of 'striation free' cutting of mild steel by fibre laser In: The Fifth International WLT-Conference on Lasers in Manufacturing, Munich. 201-207
• WALSH, DARREN A., LI, LISA E., BAKARE, M.S. and VOISEY, K.T., 2009. Visualisation of the local electrochemical activity of thermal sprayed anti-corrosion coatings using scanning electrochemical microscopy Electrochimica Acta. 54, 4647-4654
• NARANIA, S., VOISEY, K.T. and GINDY, N.N.Z, 2009. Study of the effects of the laser and process parameters in Nd:YAG based laser ablative milling on the roughness value and the depth of material removed using design of experiments In: The Fifth International WLT-Conference on Lasers in Manufacturing, Munich. 559-564
• DEEN ZHANG, S.J. HARRIS, D.G. MCCARTNEY, I.R. PASHBY, J. POWELL, P.H. SHIPWAY, K.T. VOISEY, 2008. The effect of laser transformation notching on the controlled fracture of a high carbon (C70S6) steel Materials Science and Engineering A: Structural Materials: Properties,Microstructures and Processing. 489(1-2), 273-284
• POWELL, J., PETRING, D., KUMAR, R.V., AL-MASHIKHI, S.O., KAPLAN, A.F.H. and VOISEY, K.T., 2008. THE ENERGY GENERATED BY THE OXIDATION REACTION DURING LASER-OXYGEN CUTTING OF MILD STEEL In: Proceedings of ICALEO'08, Temecula, CA, USA, October 2008. paper number 1504
• HARRIS S.J, MCCARTNEY D.G, PASHBY I.R, POWELL J, SHIPWAY P.H, VOISEY K.T.O and ZHANG D., 2008. Method of producing fracture in component e.g. connecting rod used for automotive engine, involves providing desired size of incident portion by applying laser beam so that remainder of component acts as heat sink WO2008129277-A1 10/01/2008 00:00:00
• SAEIDI, S. and VOISEY K.T., 2008. Effect of heat-treatment on oxidation behaviour of an MCrAlY bond coat prepared by different thermal spraying processes In: Surface Modifications Technology 22, Trollhattan, Sweden, Sept 2008.. 131-138
• N. AHMED, K.T. VOISEY, D.G. MCCARTNEY and I.R. PASHBY, 2007. The Effects of Microstructural Modification by HVOF Spraying and Laser Surface Melting on the Electrochemical Behaviour of Inconel 625 Proceedings of the Fourth International WLT-Conference on Lasers in Manufacturing 2007, Munich, June 2007. 401-406
• N. AHMED, G. BI, K.T. VOISEY, D.G. MCCARTNEY, I.R. PASHBY, 2007. Comparison of Microstructures and Properties of Laser Surface Treated Thermally Sprayed and Laser-Clad Coatings of Inconel 625 In: Proceedings of ICALEO'07, Orlando, FL, USA, October 2007.. (In Press.)
• AHMED, N., VOISEY, K.T., MCCARTNEY, D.G. and PASHBY, I.R., 2007. Microstructural Modifications and their Relationship with the Electrochemical Behaviour of Inconel 625 In: Proceedings of Eurocorr 2007, The European Corrosion Conference, September 2007, Freiburg im Breisgau, Germany. (In Press.)
• VOISEY, K.T., LIU, Z. and STOTT, F.H., 2006. Inhibition of metal dusting using thermal spray coatings and laser treatment Surface & Coatings Technology. 201(3-4), 637-648
• VOISEY, K.T., LIU, Z. and STOTT, F.H., 2006. Inhibition of metal dusting of Alloy 800H by laser surface melting Applied Surface Science. 252(10), 3658-3666
• VOISEY, K.T., FOUQUET, S., ROY, D. and CLYNE, T.W., 2006. Fibre swelling during laser drilling of carbon fibre composites Optics and Lasers in Engineering. 44(11), 1185-1197
• BLANCO-PINZON, C., LIU, Z., VOISEY, K., BONILLA, F. A., SKELDON, P., THOMPSON, G. E., PIEKOSZEWSKI, J. and CHMIELEWSKI, A. G., 2005. Excimer laser surface alloying of titanium with nickel and palladium for increased corrosion resistance Corrosion Science. VOL 47(NUMBER 5), 1251-1269
• VOISEY, K.T. and CLYNE, T.W., 2004. Laser drilling of cooling holes through plasma sprayed thermal barrier coatings Surface & Coatings Technology. 176(3), 296-306
• VOISEY, K.T., LIU, Z., ZOUGDANI, H. and STOTT, F.H., 2004. The use of plasma sprayed laser remelted corrosion resistant metallic coatings to inhibit metal dusting Materials Science Forum. 461-464, 553-560
• VOISEY, K.T., LIU, Z. and STOTT, F.H., 2004. Laser Surface Treatment for Inhibition of Metal Dusting In: Proceedings of International Congress on Applications of Lasers and Electro-Optics.
• VOISEY, K.T., KUDESIA, S.S., RODDEN, W.S.O., HAND, D.P., JONES, J.D.C. and CLYNE, T.W., 2003. Melt ejection during laser drilling of metals Materials Science & Engineering. A, Structural materials: properties, microstructure and processing. 356(1-2), 414-424
• VOISEY, K.T., 2003. Laser Processing of Ceramics The Industrial Laser User. 23-25
• VOISEY, K.T., KLOCKER, T. and CLYNE, T.W., 2002. Measurement of melt ejection velocities during laser drilling of steel, using a novel droplet stream interception technique Acta Materialia. 50(17), 4219-4230
• FELBERBAUM, L., VOISEY, K., GAUMANN, M., VIGUIER, B. and MORTENSEN, A., 2001. Thermal fatigue of single-crystalline superalloy CMSX-4: a comparison of epitaxial laser-deposited material with the base single crystal Materials Science and Engineering A: Structural Materials: Properties,Microstructures and Processing. VOL 299(NUMBER 1-2), 152 - 156
• VOISEY, K.T., WESTLEY J., BYRD P. and CLYNE T.W., 2001. Effects of assist gas in laser drilling of thermal barrier coated superalloys In: Material Week, Munich, Germany, October 2001. (In Press.)
• VOISEY, K.T., RODDEN, W., HAND, D. and CLYNE, T.W., 2001. Melt Ejection Characteristics During Laser Drilling of Metals In: Proceedings of International Congress on Applications of Lasers and Electro-Optics 2001. 334-343
• VOISEY, K.T., THOMPSON, J.A. and CLYNE, T.W., 2001. Damage Caused During Laser Drilling of Thermal Spray TBC Superalloy Substrates In: Proceedings of the International Congress on Applications of Lasers and Electro-Optics.
• VOISEY, K.T., CHENG, C.F. and CLYNE, T.W., 2000. Quantification of Melt Ejection Phenomena During Laser Drilling In: MRS Proceedings. J5.6