Correlations of multiscale structural evolution and homogeneous flows in metallic glass ribbons. Issue 7 (3rd July 2023)

• Record Type: Journal Article
• Authors: Ge, Jiacheng; Luo, Peng; Wu, Zhenduo; Zhang, Wentao; Liu, Sinan; Lan, Si; Almer, Jonathan D.; Ren, Yang; Wang, Xun-Li; Wang, Weihua
• Is Part Of: Materials research letters. Volume 11:Issue 7(2023)
• Page Start: 547
• Page End: 555
• Publication Date: 2023-07-03
• Subjects: Metallic glasses -- flow units -- SAXS/WAXS scattering; 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: 10.1080/21663831.2023.2187264
• Languages: English
• ISSNs: 2166-3831

Abstract

Abstract : Studying the flow behavior is critical to understand the deformation mechanism of amorphous solids. However, detecting the basic flow events in amorphous solids is challenging. Here, by simultaneous SAXS/WAXS, elementary flow carriers in wound metallic glasses are identified from flow-induced structural heterogeneities with a radius of gyration of 2.5∼3.5 nm. Their size increases and morphology changes from sphere-like to rod-like under flow. Moreover, the atomic structure exhibits an unusual change to a more disordered state during winding/annealing at the temperature of ∼0.8 Tg . This work provides an atomic-to-nanoscale description of the flow carriers of amorphous solids during deformation. Impact Statement The elementary flow carriers in metallic glasses have a radius of gyration of 2.5∼3.5 nm. During flow, their size increases and morphology changes from sphere-like to rod-like. GRAPHICAL ABSTRACT: UF0001