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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Materials Processing Fundamentals
Presentation Title Pulsed Electric Current Joining of Oxide-dispersion-strengthened Austenitic Steels
Author(s) Fei Wang, Xueliang Yan, Xin Chen, Nathan Snyder, Michael Nastasi, Khalid Hattar, Bai Cui
On-Site Speaker (Planned) Fei Wang
Abstract Scope The solid-state joining of oxide-dispersion-strengthened (ODS) austenitic steels were realized using a pulsed electric current joining (PECJ) process. Microstructures of the austenitic grain structures and oxide dispersions in the joint areas were characterized using electron microscopy. Negligible grain growth was observed in austenitic grain structures, while slight coarsening of oxide dispersions occurred at a short holding time. The mechanisms of the PECJ process may involve three steps that occur simultaneously, including the sintering of mechanical alloying powders in the bonding layer, formation of oxide dispersions, and bonding of the mechanical alloying powders with the base alloy. The high hardness and irradiation resistance of ODS alloys were retained in the joint areas. This research revealed the fundamental mechanisms during the PECJ process, which is beneficial for its potential applications during the advanced manufacturing of ODS alloys.
Proceedings Inclusion? Planned:

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