Mechanical analysis of the crystalline–amorphous laminated composite based on a two-phase model

•A two-phase model was proposed to describe crystalline–amorphous laminated composite.•Calculations of our proposed model are in accord with experimental results.•Effect of grain size and strain rate on mechanical properties of laminated composite.

A two-phase model was proposed to investigate the mechanical behaviors of crystalline/amorphous (C/A) laminated composite in this paper. By assuming the good bonding of crystalline and amorphous, a rate-dependent Newtonian viscous flow process was developed to describe the amorphous phase sliding behavior while a dislocation gliding behavior to crystalline phase. Based on the rule of mixture theory, the overall stress–strain kept consistent with experimental data. Due to the particular microstructures, the effects of grain size of crystalline phase and strain rate on the mechanical behaviors of C/A nanolaminate were discussed. The stress–strain relations were enhanced with the decreasing grain size and increasing strain rate. Obvious strain hardening was also observed. The strain hardening exponent was much larger than that of corresponding nanocrystalline (NC) materials and increased with the increasing strain rate and decreasing grain size.