MICROSTRUCTURE AND HARDNESS PROFILES OF AHSS SUBJECTED TO SIMULATED LASER WELDING THERMAL CYCLES

1 MORAWIEC Mateusz
Co-authors:
2 STANO Sebastian 2 RÓŻAŃSKI Maciej
Institutions:
1 Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Gliwice, Poland, EU, mateusz.morawiec@polsl.pl
2 Institute of Welding, Gliwice, Poland, EU, sebastian.stano@is.gliwice.pl, maciej.rozanski@is.gliwice.pl
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
647-652
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
100 views / 22 downloads
Abstract

This work presents the comparative results of twin-spot laser welding of complex phase and transformation induced plasticity steels. Both steels include Nb and Ti microalloyed elements. Tests of dual beam laser welding were carried out using keyhole welding. The sheets were welded with two different power beam distributions in order to determine the effect of simulated thermal cycles on microstructure and hardness profiles. The power distributions between the beams were 50:50 and 70:30 %. The microstructural constituents in the fusion zone, heat affected zone and base metal were identified using light microscopy and scanning electron microscopy. It was found that the change of beam distribution affects morphological details of the martensite and hardness.

Keywords: AHSS, twin-spot laser welding, dual beam, microalloying

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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