Dislocation–grain boundary interactions: recent advances on the underlying mechanisms studied via nanoindentation testing

Abstract To comprehend the mechanical behavior of a polycrystalline material, an in-depth analysis individual grain boundary (GB) and dislocation interactions is prime importance. In past decade, nanoindentation emerged as powerful tool to study local response in vicinity GB. The improved instrumentation test protocols allow capture various GB–dislocation during form strain bursts on load–displacement curve. Moreover, interaction plastic zone with GB provides important insight into transmission effects distinct boundaries. Of great importance for interpretation observed are microstructural investigations computational approaches. This review paper focused recent advances dislocation–GB underlying mechanisms studied via nanoindentation, which includes pop-in phenomenon, localized movement under ambient conditions, slip transfer mechanism using theoretical treatments simulations. Graphical abstract