Fig. 2: Chemical short-range orderings and ordered oxygen complexes (OOCs). | Nature Communications

Fig. 2: Chemical short-range orderings and ordered oxygen complexes (OOCs).

From: Manipulating the ordered oxygen complexes to achieve high strength and ductility in medium-entropy alloys

Fig. 2

a–e STEM-HAADF images for the [011]bcc crystal axis in the Ti–30Zr–xNb (x = 14, 18, 22, 26, and 30 at.%) MEAs. The degree of chemical short-range orderings decreases with increasing Nb content. f, g Intensity line profiles corresponding to the orange and green squared regions in (a) and (e), respectively, indicating a reduced chemical inhomogeneity in Ti–30Zr–30Nb MEA than that in Ti–30Zr–14Nb MEA. h, i iDPC images for the [011]bcc crystal axis with different adjusted contrast to reveal the existence of chemical short-range orderings in the Ti–30Zr–14Nb–3O MEA. Red squares represent the Ti/Zr-rich regions and orange squares indicate the Nb-rich regions. h1, h2 Enlargements of the orange and red squares in (h), revealing the formed OOCs. j Intensity line profile of the red dashed line in (h2), which is obtained by the standard tool of Digital Microscopy software. k Schematic diagram of the OOC. Gray, orange and blue bubbles represent Ti/Zr, Nb, and O atoms, respectively.

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