Journal
LASER ASSISTED NET SHAPE ENGINEERING 9 INTERNATIONAL CONFERENCE ON PHOTONIC TECHNOLOGIES PROCEEDINGS OF THE LANE 2016
Volume 83, Issue -, Pages 277-285Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.phpro.2016.08.025
Keywords
Laser forming; laser; optimization; AHSS; micro hardness
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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. (C) 2016 Published by Elsevier B.V.
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