About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
4th World Congress on High Entropy Alloys (HEA 2026)
|
| Presentation Title |
Chemical Short-Range Order in High-Entropy Alloys: Detection, Thermodynamics and Kinetic Nature and Property Control |
| Author(s) |
Pedro Henrique Fernandes Oliveira, Caio Lucas Gueiros Pedrosa Martins, Guilherme Cardeal Stumpf, Julio Spadotto, Edward John Pickering, Walter Jose Botta, Claudemiro Bolfarini, Francisco Gil Coury |
| On-Site Speaker (Planned) |
Francisco Gil Coury |
| Abstract Scope |
Chemical short-range order (CSRO) has emerged as a debated structural feature that may significantly influence the behavior of high-entropy and complex concentrated alloys. This presentation provides an integrated perspective on CSRO, connecting its experimental detection, thermodynamic and kinetic origins, and its role in phase stability and material performance. Recent advances in characterization techniques, including diffraction-based techniques, dilatometry, calorimetry, and advanced microscopy, are discussed alongside emerging strategies to assess and quantify CSRO in bulk materials. The thermodynamic and kinetic nature of CSRO is interpreted through a unified framework that bridges experimental observations reported by multiple groups with classical concepts of phase transformations and ordering phenomena. The effects of CSRO on a broad range of properties investigated within our research program will be presented, including conventional mechanical behavior, deformation mechanisms, performance under extreme conditions, hydrogen embrittlement, and functional responses. Particular emphasis is placed on identifying the physical origins of these effects and on providing insights into which classes of properties could be most sensitive to local chemical ordering. |
| Proceedings Inclusion? |
Undecided |