Project title: The Modeling and Practice of Multiple Track Laser Direct Metal Deposition (LDMD)
Other PhD projects in Mechanical Engineering
| PhD student: | Muhammad Naveed Ahsan |
| Qualification: | BEng, MEng |
| Country: | Pakistan |
| Sponsor: | Government of Pakistan |
| Expert group: | Bioengineering |
| Research group: | Manufacturing and Management |
| Collaboration: | |
| Awards: | |
| Personal page: | |
| Email: | muhammadnaveed.ahsan@postgrad.manchester.ac.uk |
| Supervisor: | Dr Andrew J Pinkerton |
Professional Biography: Mr M Naveed Ahsan is a PhD student at the University of Manchester. He obtained his Masters in mechatronics engineering in 2006 and Bachelors degree in mechanical engineering in 2000 from the University of Engineering & Technology, Lahore Pakistan. He has five years experience in manufacturing industry. He is currently researching mathematical modeling of laser direct metal deposition for surface cladding and rapid manufacturing.
Research interests: Mathematical modeling of the laser deposition processes, multiple track interaction, creating of structures with controlled internal geometry and porosity, image-base modeling and non-destructive testing using computed tomography of the laser deposited structures.
Project abstract
The aim of the project is to mathematically model the laser direct metal deposition (LDMD) process and verify the models experimentally. The project will include the modelling of single deposition track to single deposition layer suitable for surface cladding/coating and multilayer deposition suitable for solid or porous volumes to be manufactured for different applications. The coupled solution for the models would be derived in order to simulate the simultaneous occurring complex nature of LDMD processes. The research will also involve investigating the effects of initial metal powder types, used for LDMD, on final deposition structure characteristics. The micro computed tomography (MicroCT) techniques would be employed to characterise the internal morphology of the laser deposited structures.
| Fig 1. Modelled multiple track surface layer deposition of Ti-6Al-4V at three different processing parameters | Fig 2. Computed tomography reconstruction image of multilayer laser deposited porous block, 3D cropped slice position reveals the interconnectivity of the pores | Fig 3. MicroCT characterization of Ti-6Al-4V powder: images of two orthogonal slices and the porosity (indicated by yellow colour spheres) in whole volume (x × y × z) under analysis are shown; (a) gas-atomized powder; (b) PREP powder |  |
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Publications
Journal Papers
- Ahsan, M Naveed and Pinkerton, Andrew J. A method and model for deposition of Ti-6Al-4V with controlled porosity, in 28th International Congress on Applications of Lasers and Electro-optics (ICALEO),. 2009. Orlando, FL USA, 2– 5 Nov 2009, paper 1005..
- Ahsan, M Naveed, Pinkerton, Andrew J, Paul, C P and Kukreja, L M. Porous surface structures by continuous and pulsed laser direct metal deposition for biomedical applications. in 23rd International Conference on Surface Modification Technologies. 2009. GRT Temple Bay, Mamallapuram India, 2-5 Nov 2009.
- Ahsan, M Naveed, Pinkerton, Andrew J. A mathematical model for surface modification by multiple track laser direct metal deposition (LDMD), submitted to Journal of Physics D:Applied Physics.
- Ahsan, M Naveed, Wang Wei, Pinkerton, Andrew J. An iterative, energy-mass balance model for laser metal deposition, accepted for 29th International Congress on Applications of Lasers and Electro-optics (ICALEO),. 2010.
- Ahsan, M Naveed, Bradley Robert, Pinkerton, Andrew J,. X-ray analysis of pore formation in direct metal deposition and its causes, accepted for 29th International Congress on Applications of Lasers and Electro-optics (ICALEO),. 2010
- 5. Ahsan, M. N, Paul, C P., Kukreja, L. M. and Pinkerton, a J., Porous structures fabrication by continuous and pulsed laser metal deposition for biomedical applications; Modelling and experimental investigation. Journal of Materials Processing Technology, doi10.1016/j.jmatprotec.2010.11.014. In Press, Accepted Manuscript.