Shock-induced time-dependent strength behavior in amorphous alloys from a microscopic view. (15th July 2016)

• Record Type: Journal Article
• Authors: Chen, Kaiguo; Yu, Yuying; Zhang, Zugen; Shi, San-Qiang
• Is Part Of: Scripta materialia. Volume 120(2016)
• Page Start: 62
• Page End: 66
• Publication Date: 2016-07-15
• Subjects: Shock -- Amorphous alloy -- Strength relaxation -- Microstructure evolution; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.04.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Shock-induced strength behavior and the corresponding microstructural evolution have remained unclear for decades. We propose a viscous-solid model from a microscopic view implied by simulations with non-equilibrium molecular dynamics. The model describes the shocked microstructure very well and shows time-dependent strength behavior upon shock-induced yielding in amorphous alloys. For the first time, we find that the Kohlrausch-Williams-Watts equation [ φ ( t ) = e −( t /) β ] is quantitatively applicable in the modelling of time-dependent strength behavior at the non-equilibrium shockwave front. The parameters in the Kohlrausch-Williams-Watts equation are found to agree well with several experimental facts. Graphical abstract: