The effect of matrix to reinforcement particle size ratio (PSR) on the microstructure and mechanical properties of a P/M processed AlCuMn/SiCp MMC

Prediction of Flow Behavior in the Heterogeneously Dispersed Al-10 vol%SiC Composites

“…It is seen that the calculated instability strain with particle damage and particle-clustering tendency is a better approximation of the experimental strain than the non-damaged and non-clustering model. This means that tensile strength and elongation were affected by clustering tendency of the particles 6,7) and their flow and strainhardening behavior were approximated quantitatively by our analysis based on decomposing LN distribution.…”

“…The highest strain and stress concentrations occur in regions where particles are closely packed. [1][2][3] In general, the local concentration of particle distribution is found to have an adverse effect on the ductility and flow stress of the composites [4][5][6][7][8] mostly due to the enhanced damage initiation and development within the clusters. Thus the previous model, 9,10) considering only the combination of strain-hardening and corresponding damage accumulation behavior, is not enough to understand the effect of spatial distribution of the second phase particles in the composites.…”

Effect of Volume Fraction on the Flow Behavior of Al-SiC Composites Considering the Spatial Distribution of Delaminated Particles

“…Previous studies 12,13) have shown that optimization of the PRS ratio can give a more homogeneous distribution of the reinforcement particles, leading to an improvement in the mechanical properties of the composites. The details of the five prepared samples are listed in Table 2.…”

“…First, a more-random distribution was achieved by using a lower RPS ratio for all the samples, as this governed the clustering tendency of the composite. 12,13) Secondly, all the samples are wet blended after ultrasonica- tion, which produces a more uniform random distribution than does a dry blending method. Figure 3 shows the tensile properties, such as the flow stress (" ¼ 0:06), UTS and elongation, of composites having different volume fractions of reinforcement particles.…”

“…During the past few years, the aim of most experimental and numerical studies [12][13][14][15][16][17][18][19][20] has been to elucidate the effects of the morphological properties of the second-phase particles, such as the volume fraction, size, shape, orientation, and spatial distribution, on the deformation and damage behavior of alloys and composites. Furthermore, it is important to stress that nucleation sites and the growth of the microcracks are not uniformly distributed, and therefore behaviors cannot be represented solely in terms of the initial global parameters of the composites.…”