Rate Dependence of Serrated Flow During Nanoindentation of a Bulk Metallic Glass
By C. A. Schuh, T. Nieh, Y. Kawamura. 2002
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Plastic deformation of Pd–40Ni–20P bulk metallic glass (BMG) was investigated by instrumented nanoindentation experiments over a broad range of indentation strain rates. At low rates, the load–displacement curves during indentation exhibited numerous serrations or pop-ins, but these serrations became less prominent as the indentation rate was increased. Using the tip velocity during pop-in as a gauge of serration activity, we found that serrated flow is only significant at indentation strain rates below about 1–10/s. This result suggests a transition in plastic flow behavior at high strain rates, in agreement with prior studies of BMGs under different modes of loading.
Subfields: Computational Mechanics, Mechanical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/f10ccbd345a9fd053b8dffcb50166d5fb4993f04
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In Computational Mechanics
In Mechanical Engineering
In Mechanics of Materials
Citations in the corpus
- Micro- and nanoindentation techniques for mechanical characterisation of materials (2006, methodology): “…s–1 on amor- phous Al90Fe5Gd5 (after Jiang and Atzmon, 2003) 36 Indentation–depth load curve of a Pd–40Ni–20P BMG measured at different loading rates (after Schuh et al., 2002) International Materials Reviews 2006 VOL 51 NO 4 235 Schwaiger et al. (2003) examined strain rate sensitivity in a…”