A nanoindentation study of the viscoplastic behavior of pure lithium

Yikai Wang, Yang Tse Cheng

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

Applying mechanical stresses is a possible approach to suppress dendrite and mossy lithium (Li) in Li metal electrodes. We conducted, in this work, nanoindentation tests on pure Li metal in an argon-filled glove box to study its viscoplastic behavior at room temperature. Both load-controlled and strain rate-controlled nanoindentations showed clear viscoplastic characteristics of Li. Based on an iterative finite element (FE) modeling approach, we determined a viscoplastic constitutive law for Li. In addition, we demonstrated by FE modeling that elastic modulus, on the order of GPas, has a negligible influence on the nanoindentation response of Li at ambient temperature.

Original languageEnglish
Pages (from-to)191-195
Number of pages5
JournalScripta Materialia
Volume130
DOIs
StatePublished - Mar 15 2017

Bibliographical note

Publisher Copyright:
© 2016 Acta Materialia Inc.

Keywords

  • Finite element analysis
  • Lithium
  • Nanoindentation
  • Plasticity

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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