Extended Data Fig. 9: Mechanical behavior and microstructural analysis of the annealed HNTVA10 alloy during in situ tensile testing through SEM at room temperature.
From: Negative mixing enthalpy solid solutions deliver high strength and ductility
a, Scanning electron microscopy, sample dimensions and the Gatan microtension tester used in the tension tests. b, Stress–strain curves of the HNTVA10 sample. The inset SEM image shows the sample micrographs before and after the tensile test. c-e, SEM images of the slip traces on the sample surfaces of the different interrupted strains. The schematic below illustrates the slip traces, slip system and Schmid factor. Regarding the dislocation substructure during tensile testing, dipolar walls that mainly contain a high density of primary dislocation dipoles are observed, suggesting a typical cross-slip to form a wavy slip line (red arrow). With increasing strain, an additional slip system is activated, resulting in the formation of highly dense straight slip line (pink arrow) in different directions.
