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Updated: Nov 21, 2025

Generating Lap Joints Via Friction Stir Spot Welding on DP780 Steel
Published on: August 13, 2019
Interfacial reaction during friction stir assisted scribe welding of immiscible Fe and Mg alloy system
Hrishikesh Das1, Piyush Upadhyay2, Tianhao Wang1
1Applied Materials and Manufacturing Group, Pacific Northwest National Laboratory, Richland, WA, USA.
Abstract:
We report on interfacial characteristics and chemistry of bonded Mg-Fe interfaces welded using friction stir assisted scribe technique (FaST). Two pairs of dissimilar joints: (AZ31-DP590) and (Pure Mg-DP590) were studied to shed light on joining mechanisms responsible for bonding of "immiscible" pairs of Mg and Fe. We present first direct experimental evidence of presence of oxide layer, Al segregation by atom probe tomography and nano steel grains close to interface by transmission electron microscopy study.
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