Lancaster EPrints

An analytical-numerical model of laser direct metal deposition track and microstructure formation

Ahsan, M. Naveed and Pinkerton, Andrew J. (2011) An analytical-numerical model of laser direct metal deposition track and microstructure formation. Modelling and simulation in materials science and engineering, 19 (5). -. ISSN 0965-0393

Full text not available from this repository.

Abstract

Multiple analytical and numerical models of the laser metal deposition process have been presented, but most rely on sequential solution of the energy and mass balance equations or discretization of the problem domain. Laser direct metal deposition is a complex process involving multiple interdependent processes which can be best simulated using a fully coupled mass-energy balance solution. In this work a coupled analytical-numerical solution is presented. Sub-models of the powder stream, quasi-stationary conduction in the substrate and powder assimilation into the area of the substrate above the liquidus temperature are combined. An iterative feedback loop is used to ensure mass and energy balances are maintained at the melt pool. The model is verified using Ti-6Al-4V single track deposition, produced with a coaxial nozzle and a diode laser. The model predictions of local temperature history, the track profile and microstructure scale show good agreement with the experimental results. The model is a useful industrial aid and alternative to finite element methods for selecting the parameters to use for laser direct metal deposition when separate geometric and microstructural outcomes are required.

Item Type: Article
Journal or Publication Title: Modelling and simulation in materials science and engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59503
Deposited By: ep_importer_pure
Deposited On: 26 Oct 2012 15:06
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:16
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59503

Actions (login required)

View Item