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

Ghazal Sheikholeslami; S. P. Edwardson; J. Griffiths; G. Dearden

doi:10.1016/j.phpro.2014.08.069

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

Ghazal Sheikholeslami
, S. P. Edwardson
, J. Griffiths
, G. Dearden

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	1392-1399
Journal	Physics Procedia
Volume	56
DOIs	https://doi.org/10.1016/j.phpro.2014.08.069
Publication status	Published - 9 Sept 2014

Keywords

Advanced high strength steels
DP1000
Laser bending
Laser forming

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title = "Optimization of beam mode for high efficiency laser thermal forming within metallurgical constraints",

abstract = "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.",

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author = "Ghazal Sheikholeslami and Edwardson, \{S. P.\} and J. Griffiths and G. Dearden",

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T1 - Optimization of beam mode for high efficiency laser thermal forming within metallurgical constraints

AU - Sheikholeslami, Ghazal

AU - Edwardson, S. P.

AU - Griffiths, J.

AU - Dearden, G.

PY - 2014/9/9

Y1 - 2014/9/9

N2 - 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.

AB - 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.

KW - Advanced high strength steels

KW - DP1000

KW - Laser bending

KW - Laser forming

U2 - 10.1016/j.phpro.2014.08.069

DO - 10.1016/j.phpro.2014.08.069

M3 - Article

SN - 1875-3892

VL - 56

SP - 1392

EP - 1399

JO - Physics Procedia

JF - Physics Procedia

ER -

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

Abstract

Keywords

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