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Götzinger, Bruno
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Publications (3/3 displayed)
- 2020Mechanical properties and fracture modes of thin butt-joined aluminum-steel blanks for automotive applicationscitations
- 2020Modeling the Failure Behavior of Self-Piercing Riveting Joints of 6xxx Aluminum Alloycitations
- 2016Experimental investigations on single-sided CMT welding of hybrid aluminum-steel blanks
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document
Experimental investigations on single-sided CMT welding of hybrid aluminum-steel blanks
Abstract
Single-sided Cold Metal Transfer welding of aluminum alloy EN AW 6014 T4 and zinc-coated dual phase steel<br/>HCT450X + ZE75/75 was investigated. These materials are typically used for automotive lightweight application,<br/>e.g. in multi-material car bodies. The microstructures of the weld seam and of the intermetallic layer between the<br/>steel sheet and the weld seam were characterized by conventional optical light microscopy and by scanning<br/>electron microscopy with energy-dispersive X-ray spectroscopy. The results of the experimental investigations<br/>indicate that the intermetallic layer has tongue/tooth-like morphology of less than 20 μm thickness, which is<br/>acceptable to meet the requirements regarding the mechanical properties. However, hot cracks which deteriorate<br/>the formability of the metal blanks in subsequent processing steps may form during the welding process. In order<br/>to reduce the hot cracking tendency different welding process parameters and filler materials were tested.