标题：Deformation behavior of designed dual-phase CuZr metallic glasses
作者：Peng, C. X.; Sopu, D.; Cheng, Y.; Song, K. K.; Wang, S. H.; Eckert, J.; Wang, L.
作者机构：[Peng, C. X.; Cheng, Y.; Song, K. K.; Wang, S. H.; Wang, L.] Shandong Univ Weihai, Sch Mech Elect & Informat Engn, WenhuaXilu 180, Weihai 264209, Peop 更多
通讯作者：Wang, L;Wang, L
通讯作者地址：[Wang, L]Shandong Univ Weihai, Sch Mech Elect & Informat Engn, WenhuaXilu 180, Weihai 264209, Peoples R China.
来源：MATERIALS & DESIGN
关键词：Metallic glasses; Molecular dynamics; Dual-phase metallic glasses;; Deformation; Ductility
摘要：A nanometer-scale second phase inmetallic glass(MG) heterostructures is effective to improvemechanical properties. In this work, molecular dynamics simulations are conducted to investigate the influence of various critical structural aspects such as the size/ volume fraction, distribution of a nanoscale secondary phase and different combinations of the matrix and the secondary phase on the deformation behavior of dual-phase MGs. We find an obvious change in deformation mode with varying the size/ fraction and the chemical composition of the secondary phase. When the yield stress of the dual-phase MGs is lower than critical shear stresses required for forming a mature shear band (SB), the MGs show homogeneous deformation. Otherwise, those dual-phase MGs with inclusions smaller than width of the SB or that cannot confine plastic zones between the larger inclusions have high tendency for shear instability and brittle failure. By systematically varying the characteristics of the secondary phase one can design MGs with improved mechanical properties. (c) 2019 The Authors. Published by Elsevier Ltd.