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On formability of tailor laser welded blanks of DP/TRIP steel sheets

  • This paper aims to evaluate the formability of tailor welded blanks of dual phase (DP600)/transformation induced plasticity (TRIP700) steel sheets. In this work, bead on plate butt joints of 2·5 mm DP600 and 1·2 mm TRIP700 steel sheets were performed using CO2 laser beam welding. Microhardness measurements and transverse tensile testing were carried out to characterise the welds. The formability of base metals and welds were investigated by standard Erichsen test. In a perpendicular tensile test to the weld line, all specimens were fractured at the TRIP base metal, and the strengths were somewhat higher than those of base metal. There was a significant reduction in formability caused by welding of the DP600/TRIP700 steel sheets, and the formability increased with increasing welding speed.

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Author:Essam Ahmed, Uwe Reisgen, Markus Schleser, Oleg Mokrov
Parent Title (English):Science and technology of welding and joining
Place of publication:Leeds
Document Type:Article
Year of Completion:2010
Date of the Publication (Server):2013/09/10
First Page:337
Last Page:342
Institutes:FH Aachen / Fachbereich Maschinenbau und Mechatronik
collections:Verlag / Maney