About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys III: Mechanical Behavior
|
| Presentation Title |
Chemical Core-shell Metastability-induced Large Ductility in a Medium-entropy Managing Alloy |
| Author(s) |
Farahnaz Haftlang, Jae Bok Seol, Alireza Zargaran, Jongun Moon, Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Farahnaz Haftlang |
| Abstract Scope |
Maraging structural materials have been traditionally indicated as essential metallic alloys for hundreds of years. The highest strength of the aged martensite alloys requires the formation of high-nanoprecipitate density; however, it often results in insufficient ductility which limits their application. Here, we describe how these alloys obtain enhanced ductility at high strength by injecting reversion-induced metastable austenite into the brittle microstructure, in which we develop a novel dual-phase medium-entropy maraging alloys with a strength of 1.6 GPa and ductility of ~25%. Generating the large fraction of austenite metastability with a chemical core-shell microstructure during a simple process of reversion drives profuse heterogeneities at chemical and structural states, including additional precipitation strengthening and transformation-induced plasticity effect. The combined metastability and heterogeneity, realized with heat-treatment techniques that are accessible processing routes in a wide range of academic and industrial applications, can provide a breakthrough to develop sustainable maraging materials with large ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, Mechanical Properties |