Effects of particulate agglomerated degree on deformation behaviors and mechanical properties of in-situ ZrB₂ nanoparticles reinforced AA6016 matrix composites by finite element modeling

Abstract

In this paper, both the tensile deformation behaviors and mechanical properties of in situ ZrB 2 nanoparticles reinforced AA6016 matrix composites are investigated with finite element analysis. For the modeling, the volume fraction of nano ZrB 2 particles is defined by combining cluster sizes with particulate agglomerated degree which was observed in the agglomeration clustered regions by experiments. The effects of clusters on the mechanical behaviors of composites are disclosed according to qualify mechanical behaviors of local particulate agglomeration. The results indicate that finite element analysis is performed to predict the Young's modulus of composites, which is in good agreement with the experimental results. In addition, the speed of stress concentration is faster when the agglomerated degree elevates, which minimizes elongation of composites under the same particle volume fraction. Likewise, under the same agglomerated degree, the higher particle volume fraction of composites triggers the reduction of elongation.

Microstructure and mechanical properties of Al–Si–Cu–Fe alloy-based ceramic particle-reinforced nanocomposites and microcomposites and a modified model to predict the yield strength of nanocomposites

“…Equations (2) and (3) have been developed for N-AMCs with the nano-Al 2 O 3 and nano-SiC particles, respectively, considering the porosity levels shown in Table 3 and using the data related to the cluster fraction given in the study of Sun et al. 69 However, the effective volume ratio for the micro-Al 2 O 3 and micro-SiC-reinforced composites has been neglected, as the micro-sized reinforcement particles are almost ineffective in the strengthening mechanisms as shown in Figure 13, and the cluster levels of micro-particles have been much lower than those of nano-particles at the same volume fractions of the reinforcement particles.…”