Scientist Dr. Milan Heczko from the Institute of Physics of Materials, Czech Academy of Sciences, was part of an international research team, which identified a fundamental deformation mechanism that can be leveraged to greatly enhance the fatigue properties of metals, opening the door to a new strategy for designing fatigue-resistant alloys.
Metal alloys crack and fail through a mechanism called “fatigue” when repeatedly loaded and strained. Fatigue is governed by how a material accommodates plastic deformation, the irreversible rearrangement of its internal structure under repeated loading. As a material is cyclically loaded and unloaded, plastic deformation tends to localize and accumulate into discrete regions, which ultimately become preferential sites for fatigue crack initiation.
The work published in prestigious NATURE COMMUNICATIONS journal examined whether fatigue resistance can be drastically improved by designing alloys in which plastic deformation is engineered to remain small and uniformly distributed rather than intense and highly localized. It is confirmed that metal chemistry and structure can be specifically engineered to activate a plastic deformation mechanism that dynamically promotes the homogenization of plasticity in face-centered cubic solid solution-strengthened metallic alloys. This has significant impacts on fatigue properties, greatly enhancing fatigue strength and potentially providing a new design space for enhancing the mechanical performance of metallic materials used in structural applications.
Published work led by group of prof. Jean-Charles Stinville (University of Illinois Urbana-Champaign, Urbana, IL, USA) is a result of international collaboration with Dr. Milan Heczko (Institute of Physics of Materials, Czech Academy of Sciences) and scientists from Ruhr Universität Bochum (Germany). Collaboration with group of prof. Jean-Charles Stinville is associated with long-term research focus of Dr. Heczko on study of CrCoNi-based multi-principal element alloys. As a principal investigator, Dr. Heczko investigates mutual relationships between microstructure, mechanisms of plastic deformation and damage and macroscopic behavior of these alloys throughout the JUNIOR STAR project No. 24-11058M supported by Czech Science Foundation.
The study’s authors are Dhruv Anjaria, Milan Heczko, Daegun You, Mathieu Calvat, Shuchi Sanandiya, Maik Rajkowski, Aditya Srinivasan Tirunilai, Huseyin Sehitoglu, Guillaume Laplanche and Jean-Charles Stinville.
Reference: Anjaria, D., Heczko, M., You, D. et al. Dynamic plastic deformation delocalization in FCC solid solution metals. Nature Communications 17, 2262 (2026). https://doi.org/10.1038/s41467-026-69046-3
Note: The text is based on press release article published on the News website of The Grainger College of Engineering of University of Illinois Urbana-Champaign. Source: https://matse.illinois.edu/news/80920
