About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Feedstock Processing for Multifunctional Materials
|
| Presentation Title |
Anomalous Magnetic Properties Engineered by Novel Nanoscale Structure Evolution in AlCoxCr1–xFeNi (0 ≤ x ≤ 1) Alloy System |
| Author(s) |
Sudip Kumar Sarkar, Tirthesh Ingale, Advika Chesetti, Narendra B Dahotre, Rajarshi Banerjee |
| On-Site Speaker (Planned) |
Sudip Kumar Sarkar |
| Abstract Scope |
The exceptional mechanical and magnetic properties of transition element-based chemically concentrated alloys (CCAs) are governed by their nanoscale microstructure. Our research explores this crucial link, investigating how alloy chemistry dictates the intricate nanoscale microstructure and, in turn, the physical and mechanical characteristics of a compositionally graded AlCoxCr1-xFeNi alloy (0 ≤ x ≤ 1) system, fabricated via laser additive manufacturing. While saturation magnetization and Curie temperatures increase consistently with higher cobalt concentration, intrinsic coercivity exhibits a fascinating non-monotonic trend. Our detailed nanoscale microstructural analysis, utilizing atom probe tomography and transmission electron microscopy, uncovered a novel multi-layer core-shell structure at x ≈ 0.4, which we identified as the cause of this coercivity peak. In contrast, the compositional extremes reveal different microstructures: early-stage compositional partitioning at x = 1, and a fully developed spinodally decomposed structure at x = 0. Further, mechanical properties are investigated across the alloy series and correlated with microstructure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, High-Entropy Alloys |