Nanoindentation of zirconium based bulk metallic glass and its nanomechanical properties | Zendy

Karuppasamy Pandian Marimuthu | Zendy; Kwangmin Lee | Zendy; Jungmoo Han | Zendy; Felix Rickhey | Zendy; Hyungyil Lee | Zendy

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Nanoindentation of zirconium based bulk metallic glass and its nanomechanical properties

Author(s) -

Karuppasamy Pandian Marimuthu,

Kwangmin Lee,

Jungmoo Han,

Felix Rickhey,

Hyungyil Lee

Publication year - 2019

Publication title -

journal of materials research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.832

H-Index - 44

eISSN - 2214-0697

pISSN - 2238-7854

DOI - 10.1016/j.jmrt.2019.10.034

Subject(s) - nanoindentation , materials science , serration , indentation , composite material , zirconium , elastic modulus , amorphous metal , nanoscopic scale , deformation (meteorology) , modulus , metallurgy , nanotechnology , alloy

Nanoindentation experiments with a Berkovich tip are performed on zirconium based bulk metallic glass (Zr-BMG, Zr65Cu15Al10Ni10) to study its deformation and mechanical properties (elastic modulus and hardness) at nanoscale. Further to reveal indentation-size effect (ISE), the influence of loading rate and peak and cyclic loads on evaluated nanomechanical properties are investigated in detail. The loading rate has significant effect on serration flow (pop-in), which gets predominant at higher loads. According to the Oliver-Pharr method, hardness becomes peak load-independent, whereas elastic modulus increases with the load. The same phenomenon is observed with sinus and progressive multicycle indentation methods. However, observation of significant pile-up (the ratio of elastic and total energy We/Wt ≈ 0.33

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