Temperature gradient mechanism: overview of the multiple pass controlling factors

Edwardson, Stuart and Griffiths, Jonathan David and Dearden, Geoff and Watkins, Ken (2010) Temperature gradient mechanism: overview of the multiple pass controlling factors. Physics Procedia, 5 (A). pp. 53-63. ISSN 1875-3892

Full content URL: http://dx.doi.org/10.1016/j.phpro.2010.08.122

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Abstract

Laser forming offers the industrial promise of controlled shaping of metallic and non-metallic components for prototyping, the correction of design shape or distortion and precision adjustment applications. To date there has been a considerable amount of work carried out on two-dimensional laser forming, using multi-pass straight line scan strategies to produce a reasonably controlled bend angle in a number of materials, including aerospace alloys. A key area, however, where there is a limited understanding, is the variation in bend angle per pass during multi-pass Temperature Gradient Mechanism (TGM) based laser forming along a single irradiation track, in particular the decrease in bend angle per pass after many irradiations for a given set of process parameters. The research presented in this paper through empirical data and numerical simulation using Comsol MultiPhysics of the multi-pass laser forming of sheet mild steel, Ti6Al4V and AA5251 by CO2 laser offers a novel coherent picture of the key influencing factors and at which point in the bend evolution each is dominant.

Additional Information:Laser Assisted Net Shape Engineering 6, Proceedings of the LANE 2010, Part 1, Friedrich Alexander University Erlangen, Germany 21-24 September 2010
Keywords:Laser forming, Bending, TGM, Temperature gradient mechanism
Subjects:H Engineering > H100 General Engineering
Divisions:College of Science > School of Engineering
ID Code:11338
Deposited On:29 Jul 2013 08:15

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