A nanoindentation study of the viscoplastic behavior of pure lithium. (15th March 2017)

• Record Type: Journal Article
• Authors: Wang, Yikai; Cheng, Yang-Tse
• Is Part Of: Scripta materialia. Number 130(2017)
• Page Start: 191
• Page End: 195
• Publication Date: 2017-03-15
• Subjects: Lithium -- Nanoindentation -- Plasticity -- Finite element analysis; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.12.006
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: