Mechanical properties of a Cu46Zr54 bulk metallic glass with embedded crystalline nano particles 1 st Pan-American Congress on Computational Mechanics - PANACM 2015 XI Argentine Congress on Computational Mechanics - MECOM 2015 S. Idelsohn, V. Sonzogni, A. Coutinho, M. Cruchaga, A. Lew & M. Cerrolaza (Eds) MECHANICAL PROPERTIES OF A CU 46 ZR 54 BULK METALLIC GLASS WITH EMBEDDED CRYSTALLINE NANO PARTICLES ANDRES A. MANELLI *1 , FRANCO ARDIANI 1 , CLAUDIO A. CAREGLIO 1,2 AND EDUARDO M. BRINGA 3,4 1 Facultad de Ingenier´ ıa, Universidad Nacional de Cuyo Centro Universitario, 5500 Mendoza, Argentina andresmanelli@gmail.com, francoamg@gmail.com, ccareglio@uncu.edu.ar 2 ITIC, Universidad Nacional de Cuyo Centro Universitario, 5500 Mendoza, Argentina 3 FCEN, Universidad Nacional de Cuyo Centro Universitario, 5500 Mendoza, Argentina cjruestes@hotmail.com, diego.tramontina@gmail.com,ebringa@yahoo.com 4 CONICET 5500 Mendoza, Argentina Key words: Computational Mechanics, Metallic Glass, Inclusions, Diffusivity Abstract. Plasticity in bulk metallic glasses (BMGs), is normally dominated initially by shear transformations zones (STZ), which expand to form shear bands (SB) through the material. In order to control and thus improve the dynamics of plasticity, composition of metallic glasses has been modified in different ways. Particularly, the inclusion of crystalline nanoparticles provides obstacles to SB propa- gation and growth, with SB often nucleating at the interface between the BMG and the nanoparticle. This results in a reduced and more homogeneous deformation in the plastic regime. Nevertheless, to ensure lasting effects, inclusions should be stable in time, i.e. not diffuse into the surrounding amorphous material loosing the sharp transition from crystal to amorphous. In previous work we determined constitutive parameters of the Cu 46 Zr 54 metallic glass as a function of temperature, using atomistic Molecular Dynamics (MD) simulations. We will now present results for spherical face-centered cubic (FCC) Cu inclusions. Although we do not focus on the size effects of inclusions like other studies, we analyze the stability of the nanoparticles at different temperatures. During mechanical deformation under uniaxial strain of a BMG sample with inclusions, we analyze Voronoi polyhedra, and shear stress and shear strain localization to study the role of the inclusion in the mechanical properties of this composite material. 