Stick-slip dynamics in a Ni62Nb38 metallic glass film during nanoscratching

D. X. Han, G. Wang, J. L. Ren, L. P. Yu, J. Yi, I. Hussain, S. X. Song, H. Xu, K. C. Chan, P. K. Liaw

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

Stick-slip dynamics during nanoscratching is investigated for the Ni62Nb38 metallic glass. Detrended fluctuation analysis is introduced to explore the influence of loading force on the temporal scaling and stick-slip behavior. The self-similar characteristics and complexity in the temporal scale of the lateral force signal are investigated. A modified Cauchy class model is used for the stochastic stick-slip process, which connects the fractal dimension and the Hurst exponent and features the positive correlation process. The confidence intervals of the differential friction coefficient at different loading forces elucidate the inhomogeneous (and homogeneous) shear-branching processes during the nanoscratching process.

Original languageEnglish
Pages (from-to)49-60
Number of pages12
JournalActa Materialia
Volume136
DOIs
Publication statusPublished - 1 Sep 2017

Keywords

  • Fractal dimension
  • Metallic glass film
  • Nanoscratching
  • Self-similar behavior
  • Stick-slip dynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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