Optimization of process parameters for high efficiency laser forming of advanced high strength steels within metallurgical constraints

Sheikholeslami, Ghazal, Griffiths, Jonathan David, Dearden, Geoff and Edwardson, Stuart (2016) Optimization of process parameters for high efficiency laser forming of advanced high strength steels within metallurgical constraints. Physics Procedia, 83 . pp. 277-285. ISSN 1875-3892

Full content URL: http://dx.doi.org/10.1016/j.phpro.2016.08.025

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Abstract

Laser forming (LF) has been shown to be a viable alternative to form automotive grade advanced high strength steels (AHSS). Due to their high strength, heat sensitivity and low conventional formability show early fractures, larger springback, batch-to-batch inconsistency and high tool wear.

In this paper, optimisation of the LF process parameters has been conducted to further understand the impact of a surface heat treatment on DP1000. A FE numerical simulation has been developed to analyse the dynamic thermo-mechanical effects. This has been verified against empirical data. The goal of the optimisation has been to develop a usable process window for the LF of AHSS within strict metallurgical constraints. Results indicate it is possible to LF this material, however a complex relationship has been found between the generation and maintenance of hardness values in the heated zone. A laser surface hardening effect has been observed that could be beneficial to the efficiency of the process.

Keywords:Laser forming, Laser, Optimization, AHSS, Micro hardness, NotOAChecked, JCOpen
Subjects:H Engineering > H100 General Engineering
Divisions:College of Science > School of Engineering
ID Code:24863
Deposited On:28 Oct 2016 08:54

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