Constitutive Rheological Modeling of Flow Serration Behaviour in Metallic Glasses Showing Nanocrystallization during Deformation | Zendy

M.A. Yousfi | Zendy; K. Hajlaoui | Zendy; Zoubeir Tourki | Zendy; A.R. Yavari | Zendy

Open Access

Constitutive Rheological Modeling of Flow Serration Behaviour in Metallic Glasses Showing Nanocrystallization during Deformation

Author(s) -

M.A. Yousfi,

K. Hajlaoui,

Zoubeir Tourki,

A.R. Yavari

Publication year - 2010

Publication title -

journal of nanomaterials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.463

H-Index - 66

eISSN - 1687-4129

pISSN - 1687-4110

DOI - 10.1155/2011/910962

Subject(s) - materials science , rheology , simple shear , shear (geology) , shear band , serration , constitutive equation , composite material , hardening (computing) , strain hardening exponent , softening , deformation (meteorology) , shear flow , mechanics , structural engineering , finite element method , engineering , physics , layer (electronics)

A simple micromechanism-inspired rheological model is developed that incorporates the serrated flow nature of metallic glasses subjected to compressive deformation at room temperatures. The process of propagation and the arrest of shear bands were addressed in this model. Shear-induced nanocrystallisation was believed to be responsible for strain hardening of material within the shear bands. The model is based on the assumption that the behaviour can be decomposed into two resistances acting in parallel: one captures the initial stiffness and shear softening and the second gives the time-shear-temperature hardening of material

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