title: Improved ductility of Cu64Zr36 metallic glass/Cu nanocomposites via phase and grain boundaries.
abstract: We investigate tensile deformation of metallic glass/crystalline interpenetrating phase nanocomposites as regards the effects of specific area of amorphous/crystalline phase interfaces, and grain boundaries. As an illustrative case, large-scale molecular dynamics simulations are performed on Cu64Zr36 metallic glass/Cu nanocomposites with different specific interface areas and grain boundary characteristics. Plastic deformation is achieved via shear bands, shear transformation zones, and crystal plasticity. Three-dimensional amorphous/crystalline interfaces serve as effective barriers to the propagation of shear transformation zones and shear bands if formed, diffuse strain localizations, and give rise to improved ductility. Ductility increases with increasing specific interface area. In addition, introducing grain boundaries into the second phase facilitates crystal plasticity, which helps reduce or eliminate mature shear bands in the glass matrix.
authors.affiliation: Department of Engineering Mechanics, South China University of Technology, Guangzhou, Guangdong 510640, People's Republic of China. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People's Republic of China. The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China.
authors.forename: W R
authors.initials: WR
authors.lastname: Jian
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: B
authors.initials: B
authors.lastname: Li
authors.forename: X H
authors.initials: XH
authors.lastname: Yao
authors.forename: S N
authors.initials: SN
authors.lastname: Luo