Investigation of pressure sensitive plastic flow in nanoglasses from finite element simulations. (15th April 2020)

• Record Type: Journal Article
• Authors: Hirmukhe, S.S.; Prasad, K. Eswar; Singh, I.
• Is Part Of: Scripta materialia. Number 180(2020)
• Page Start: 45
• Page End: 50
• Publication Date: 2020-04-15
• Subjects: Nanoglass -- Metallic glass -- Nanoindentation -- Pressure sensitivity -- 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.2020.01.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Finite element simulations of indentation on Sc75 Fe25 nanoglasses (NGs) and metallic glass (MG) ribbons are performed by employing extended Drucker Prager (EDP) and Von-Mises plasticity model, and pressure sensitive index, α is determined by fitting recent experimental data. It is found that yield behavior of NG is better characterised by pressure sensitive (i.e., EDP) yield criterion. In fact, α for NG is found to be around 12 0 − 20 0, while it is only 4 0 − 6 0 for MG ribbon. Further, results show that α for glassy interfaces is much higher than glassy grains of Sc75 Fe25 NG. Graphical abstract: Image, graphical abstract