Structure motif of chemical short-range order in a medium-entropy alloy. Issue 3 (4th March 2022)

• Record Type: Journal Article
• Authors: Chen, Xuefei; Yuan, Fuping; Zhou, Hao; Wu, Xiaolei
• Is Part Of: Materials research letters. Volume 10:Issue 3(2022)
• Page Start: 149
• Page End: 155
• Publication Date: 2022-03-04
• Subjects: Chemical short-range order -- electron diffraction -- unit cell -- medium-entropy alloy; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2022.2029607
• Languages: English
• ISSNs: 2166-3831

Abstract

Abstract : The chemical short-range orders (CSRO) are the sub-nanosized entities inherent in high-/medium-entropy alloys (H/MEA). To discern CSRO poses the challenge with pending issues as to under what zone axis in electron diffraction, signature scattering specific to CSRO will appear and what the structure motif of CSRO is. Here, we show extra diffuse scattering by CSRO from [111] and [112] directions in a VCoNi MEA and accordingly, construct the L 1 1 -type structure motif, and derive the spacial shape of flat cuboid of CSRO in virtue of diffractions under varying zone axis. Moreover, we demonstrate the methods to identify CSRO in lattice images. GRAPHICAL ABSTRACT: UF0001 IMPACT STATEMENT: The structure motif is constructed as L 1 1 -type for chemical short-range order in a medium-entropy alloy in terms of electron diffractions under the multiple zone axis.