Study of mechanical deformation in bulk metallic glass through instrumented indentation

摘要: Instrumented sharp indentation experiments at the nano- and micro-length scales were carried out in an attempt to quantify deformation characteristics of Vitreloy 1  bulk metallic glass. The accompanied by detailed three-dimensional finite element simulations instrumented formulate overall constitutive response. By matching experimentally observed continuous results with predictions, a general Mohr-Coulomb type description was extracted capture dependence multiaxial on both shear stresses normal stresses. This response is able provide accurate predictions evolution bands seen uniaxial compression tests. Constrained material around indenter incomplete circular patterns whose location, shape size are also captured well numerical simulations. analysis predict extent pile-up indenter. surface features consistent mechanisms such as localized flow, serrated yielding adiabatic heating, which during macroscopic mechanical  2001 Acta Materialia Inc. Published Elsevier Science Ltd. All rights reserved.