Influence of the Surface and Heat Treatment on the Bond Strength of Galvanized Steel/Aluminum Composites Joined by Plastic Deformation

Abstract

The influence of a chemical or mechanical surface modification followed by different post-heat treatments on the bond strength of galvanized steel/aluminum composites is studied. An incremental rolling process is used for joint formation based on plastic deformation. The morphology, the chemical state of the modified surfaces as well as the cross-section, and local potential distribution of the welded zone is characterized by different microscopic and spectroscopic methods. The stability of the joint is analyzed by a shear-force test in combination with microscopic failure analysis. A clear correlation between pre/post-treatment and the joint strength is observed. 1709/16-2, HO 2356/8-2, and MA 1175/36-2 as part of the ECUF project (SPP 1640 framework). Special thanks are due to N. Buitkamp (CMP) for supplying the FE-SEM measurements.

Electrografting of 4-Nitrobenzenediazonium Salts on Al-7075 Alloy Surfaces—The Role of Intermetallic Particles

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