Metallic glass (MG), an intrinsic heterogeneous structure at the atomic scale, is one of the promising engineering materials with intriguing physical properties. MG often suffers from the fatigue issue caused by the repetitive mechanical loading, but it is still elusive how the local heterogeneity evolves and affects the macroscale fatigue and deformation against bulky external stress. In this study, we investigate the fatigue effect in Zr-Cu-Al ribbon using a bending fatigue method. We used scanning probe microscopy (SPM) in parallel with X-ray diffraction and X-ray photoelectron spectroscopy to figure out the loading effect on the local heterogeneities. The spatially resolved SPM images show that there is a local fluctuation of mechanical and electrical properties on the fatigued side along with morphological deformation compared to the unloaded side. Approaching the broken edge where the fatigue failure occurs, the decaying tendency is not only more dominant but also accelerated by surface oxidation of the fatigued regions. Our study provides a useful guideline on how to monitor structural changes of MGs under fatigue conditions in service and will open a door toward commercialization of high-performance structural engineering materials.
|Number of pages||10|
|Publication status||Published - 2022 Nov 15|
Bibliographical noteFunding Information:
J.H.K. and G.H.L. were supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning(NRF-2017R1A2B2006568), Creative-Pioneering Researchers Program through Seoul National University (21A20131912052), and 2018M3D1A1058793. G.H.Y., W.H.R., and E.S.P. were supported by Samsung Research Funding Center of Samsung Electronics under Project Number SRFC-MA1802-06.
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)