| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation-induced Manipulation of Defect Structures and Hierarchical Microstructures
|
| Presentation Title |
Exploring Joining Mechanism for Immiscible System: Friction Stir Welding of Pure Mg and Pure Fe |
| Author(s) |
Hrishikesh Das, Bharat Gwalani, Xiaolong Ma, Piyush Upadhyay |
| On-Site Speaker (Planned) |
Hrishikesh Das |
| Abstract Scope |
While welding various Mg alloys and steels has a direct impact on structural light-weighting in automobile industries, joining pure Mg and pure Fe is scientifically crucial to understanding the joining mechanism. Three pairs of dissimilar FSW joints: (AZ31-DP590), (Pure Mg-DP590) and (Pure Mg-Pure Fe) were studied to shed light on joining mechanisms responsible for bonding of “immiscible” pairs of Mg and Fe. Transmission electron microscopy (TEM) and atom probe tomography (APT) were conducted at the interface. In the case of AZ31-DP590, the interface was mediated by a nano scale thin layer of segregated Al. A complex Al/Mg oxide layer is also found at the interface. In case of pure Mg-DP590, the interface consists of nano scale oxygen rich layer which may act as a bridging layer between the two immiscible system via lattice matching. Whereas Pure Mg and pure Fe were bonded by a critical interfacial MgO/FeO/Fe nano-crystalline oxide layer. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Magnesium, Iron and Steel |