About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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High Entropy Alloys IX: Structures and Modeling
|
Presentation Title |
Nitrogen-induced Solid Solution Hardening of an Austenitic (CrFeMnNi) HEA |
Author(s) |
Mathieu Traversier, Pierre Rinn, Emmanuel Rigal, Anna Fraczkiewicz |
On-Site Speaker (Planned) |
Mathieu Traversier |
Abstract Scope |
Nitrogen is known as a strong austenite stabiliser in classical stainless steels, leading also to an efficient solid solution hardening. In this work, the effects of N on behavior of a non-equiatomic CrFeMnNi HEA have been studied. Four alloys (300g ingots) have been prepared by cold crucible melting and doped by nitrogen (up to 0.3 mass. %) in liquid state. Microstructure and phase stability were investigated through SEM/EDX and compared with thermodynamics predictions (Thermocalc). Mechanical characteristics have been evaluated from hardness measurements. Strong solid solution hardening effect of nitrogen has been shown, with an increase of hardness of 140 HV / mass % of N, accompagned by a significant increase of lattice parameter (0.3646 Å / mass % ). These values are similar or slightly higher of those measured in classical stainless steels. |
Proceedings Inclusion? |
Planned: TMS Journal: Metallurgical and Materials Transactions |
Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |