Grain Boundary Physics and Engineering in Structural Alloys
This community investigates the atomic structure, energy, and dynamics of grain boundaries in metals and alloys to control mechanical strength, deformation behavior, and thermal stability.
The work centers on how grain boundaries migrate, slide, and segregate solute atoms under stress and heat. Researchers use molecular dynamics simulations, phase-field modeling, and in-situ electron microscopy to map boundary character distributions and predict how these interfaces influence plastic deformation, creep resistance, and grain growth. Specific applications include optimizing stainless and silicon steels, nanocrystalline copper, and high-entropy alloys. The recurring focus is on manipulating boundary energy and segregation to stabilize microstructures against degradation, with significant attention to the interplay between boundary structure and macroscopic mechanical properties in engineering materials.
The community is most prominent in nickel research, where it accounts for 0.8% of all tracked nickel papers, followed by copper at 0.6% and aluminium at 0.7%. It also represents a notable share of iron research at 0.4%.
The group comprises 20,644 papers, published primarily in Acta Materialia, Scripta Materialia, and the Journal of Materials Science.
Recent work continues to focus on quantifying deformation mechanisms in small-grained metals, observing dopant diffusion in oxide boundaries, and enhancing oxidation resistance in superalloys through boundary engineering.