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Main Title: Numerical and Experimental Investigation of Controlled Weld Pool Displacement by Electromagnetic Forces for Joining Dissimilar Materials
Author(s): Heßmann, Jennifer
Bachmann, Marcel
Hilgenberg, Kai
Type: Article
Abstract: In order to reduce CO2 emissions, an increasing interest in lightweight construction exists in the automotive industry, especially the multi-material-design approach. The main construction materials here are steels and aluminium alloys. Due to their different physical material properties and limited mutual solubility, these two materials cannot be joined thermally without difficulty. This paper presents a new joining approach for dissimilar materials. It uses electromagnetic displacement of a laser-generated melt pool to produce overlap joints between 1 mm steel (1.0330) and 2 mm aluminium alloy (EN AW 5754). Contactless induced Lorentz forces are generated by an alternating current (AC) magnet system. The controlled displacement of the aluminium alloy melt into the hole of the overlying steel sheet is investigated through numerical and experimental studies. The numerical results are compared with cross sections and thermocouple measurements. For the first time, it is possible to achieve a reproducible controlled melt pool displacement on thin sheets to produce overlap joints between dissimilar materials.
Subject(s): laser beam welding
dissimilar materials
joining technology
electromagnetic field
Lorentz force
numerical investigation
Issue Date: 29-Oct-2020
Date Available: 13-Nov-2020
Language Code: en
DDC Class: 530 Physik
Journal Title: Metals
Publisher: MDPI
Volume: 10
Issue: 11
Article Number: 1447
Publisher DOI: 10.3390/met10111447
EISSN: 2075-4701
TU Affiliation(s): Fak. 5 Verkehrs- und Maschinensysteme » Inst. Werkzeugmaschinen und Fabrikbetrieb » FG Verfahren und Technologien für hochbeanspruchte Schweißverbindungen
Appears in Collections:Technische Universität Berlin » Publications

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