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정의환(Uihwan Jeong),한정무(Jungmoo Han),Karuppasamy Pandian Marimuthu,이영서(Lee Youngseo),이형일(Hyungyil Lee) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Despite the excellent mechanical properties, practical application of bulk metallic glasses (BMGs) is limited due to difficulties in fabricating bulk products from BMG. Alternatively, BMGs are deposited as thin film on substrates i.e. thin-film metallic glass (TFMG) for utilizing their mechanical performances. As tensile or compression testing at nanoscale is infeasible for mechanical characterization, we use nanoindentation tests to investigate the nanomechanical behavior of Zr-TFMG deposited on various substrates. The deformation behaviors of Zr-TFMG and mechanical properties are then analyzed through finite element (FE) simulations. The effects of peak and cyclic loads and loading rate on the nanomechanical properties are investigated. Observation of significant pile-up of TFMG on Si substrate demonstrates that the deformation behavior of Zr-TFMG is affected by substrate material. Finally, based on the experimental and numerical nanoindentation studies, the nanomechanical properties of Zr-TFMG were evaluated.