Shimadzu Review Vol.79[3・4](2022)
Next Generation Mobility


Multifaceted Evaluation of Dissimilar Material Joints for Vehicle Weight Reduction

by Tsuginosuke HashimotoYusuke FutamataSatoshi YoshimiNaoshi Kakio

Shimadzu Review 79[3・4] (2022)


Technology for joining dissimilar materials is being used to reduce vehicle weight. Friction stir welding and friction stir spot welding were originally intended for low-melting-point metals, such as aluminum alloys, but their applications have been expanding to high-melting-point metals and non-metals. The strength of friction stir and friction stir spot welds is affected by multiple factors, including the thickness of intermetallic compounds generated at joint interfaces, defects and microstructures in the joint area, and so on. Therefore, when using the welding methods in industrial fields it is important to determine effective methods for evaluating factors that can affect joint strength. This article describes an example of using an ultrasonic optical flaw detector, X-ray CT system, electron probe microanalyzer, and a universal testing machine for a multifaceted evaluation of a joint between aluminum alloy and galvannealed steel sheet metal materials.

Solutions Center of Excellence, Analytical & Measuring Instruments Division, Shimadzu Corporation, Kyoto, Japan

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