Optimization of beam mode for high efficiency laser thermal forming within metallurgical constraints

Edwardson, Stuart P ORCID: 0000-0001-5239-4409, Griffiths, Jonathan, Sheikholeslami, Ghazal and Dearden, Geoff ORCID: 0000-0003-0648-7473
(2014) Optimization of beam mode for high efficiency laser thermal forming within metallurgical constraints. .

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In the laser forming (LF) process, laser induced temperature distribution within the work-piece is of paramount importance. Through control of process parameters and depending on work-piece geometry, the temperature distribution can be altered to achieve either localized plastic compressive strains or elastic-plastic buckling. Conventionally, three process parameters are manipulated in order to control the temperature distribution within the work-piece; traverse speed, average power and spot size. Additionally, the intensity distribution and geometrical shape of the beam incident on the work-piece surface can be manipulated. The latter has the potential to be useful in maintaining bend angle per pass whilst working within strict metallurgical constraints. In this paper, the effect of beam intensity distribution and geometrical shape on the LF of automotive grade high strength DP 1000 steel sheet is investigated numerically and experimentally, with particular emphasis on optimization for minimal microstructural transformation.

Item Type: Conference or Workshop Item (Unspecified)
Uncontrolled Keywords: Laser Forming, Laser Bending, DP1000, Advanced High Strength Steels
Depositing User: Symplectic Admin
Date Deposited: 05 Jul 2016 07:50
Last Modified: 19 Jan 2023 07:34
DOI: 10.1016/j.phpro.2014.08.069
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002081