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Fatigue-Induced Surface Modification of Zr-Based Metallic Glass under Environmental Conditions

Cited 3 time in Web of Science Cited 3 time in Scopus

Kim, Jong Hun; Yoo, Geun Hee; Ryu, Wook Ha; Park, Eun Soo; Lee, Gwan-Hyoung

Issue Date
ACS Publications
ACS OMEGA, Vol.7 No.45, pp.41256-41265
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.
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Related Researcher

  • College of Engineering
  • Department of Materials Science & Engineering
Research Area 2D materials, 2차원 물질, Smiconductor process, semiconductor devices, 반도체 공정, 반도체 소자


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