Metallurgical joining of immiscible system: Pure Mg and pure Fe

Understanding the metallurgical joinability of pure Mg and Fe their interfacial microstructure lays foundation for deciphering complicated mechanism joining various magnesium alloys steels in applications. Pure were successfully joined to form a bond first time using friction stir assisted scribe technique. Through detailed characterization, we found that two immiscible metals are bonded by critical oxide layer spans only ~40 ± 10 nm. We present direct experimental evidence presence an Mg/Fe oxide-rich high-resolution electron microscopy discuss contribution formation toward successful mechanism.