Tong, XWang, GangBednarčík, JJia, Y DHussain, IYi, JStachurski, ZbigniewZhai, Q.J2024-05-080921-5093http://hdl.handle.net/1885/317371The in-situ observation of structural evolution of a metallic glass pillar during deformation is carried out in a high energy synchrotron X-ray source. The changes of the first maximum in structure factor, S(q), reveal the evolution of atomic structure upon stress. The width of the first maximum in S(q) increases as stress increasing during elastic deformation. After the elastic deformation, the serrated flow occurs, in which the width of the first maximum of S(q) in the loading stage of the serration event also increases. The broadening of the first maximum in S(q) means that the stress induces disordering of the glassy phase, which is because the densely packed clusters is separated into many loosely packed ones. This creates the excess free volumes.The work was supported by grants from the National Key Research and Development Program of China (No. 2017YFB0701902), MOST (No. 2015CB856800), the Natural Science Foundation of China (No. 51671120 and 51501106), the 111 project (No. D16002) and the Natural Science Foundation of Shanghai (No. 17ZR1440800). Parts of this research were carried out at the light source PETRA III (beamline P02.1) at DESY, a member of the Helmholtz Association (HGF).application/pdfen-AU© 2018 Elsevier B. V.Metallic glassHigh-energy X-ray diffractionMicroindentation of pillarSerration eventsStructural evolution201810.1016/j.msea.2018.02.0502023-01-08