Effect of silicon carbide particles on the mechanical and plastic properties of the AlMg6/10% SiC metal matrix composite

Abstract

This work deals with studying the effect of reinforcing SiC particles on the mechanical and plastic properties of a metal matrix composite with a matrix of aluminum alloy AlMg6 (the 1560 aluminum alloy according to the Russian State Standard GOST 4784−97). We assess this effect using the results of mechanical tests at the microscale and macroscale levels. The paper analyzes the fracture mechanism at the microlevel under tensile and compressive stress conditions, as well as the type of contact between the composite constituents. The experimental results obtained for the metal matrix composite are compared with analogous experimental data for the AlMg6 alloy and a compacted material made from the AlMg6 alloy (a compacted powder without addition of SiC reinforcing particles). The studied compacted materials were not previously subjected to extrusion. The tests show a decisive influence of the reinforcing particles on the plastic and mechanical properties of the AlMg6/10% SiC metal matrix composite under compression and tension. For example, the addition of silicon carbide increased the initial yield stress of the compacted material by 26% under tensile tests, and the percentage elongation after fracture was increased up to 1.1%, while it amounted to 0.02% for the compacted material without addition of silicon carbide. Under compression, on the contrary, the addition of silicon carbide degraded plastic properties. As a result, the percentage compression before cracking was 28.4% and 57.9% for the compacted materials with and without addition of silicon carbide, respectively.

Using the Instrumented Indentation Technique to Determine Damage in Sintered Metal Matrix Composites after High-Temperature Deformation

“…When the indenter is pressed into the metal matrix composite, the indentation diagram is affected by both the composite matrix and the reinforcing particles. Under low loads, the indenter penetrates either only into the matrix or only into the reinforcing material, and this causes a large scatter in the indentation diagrams [41,42]. As the load gradually increases, this scatter decreases and reaches a certain threshold value, which is determined by the variation of the macroscopic properties of the specimen and by the measurement error of the device.…”

Investigation of the buckling behavior of a control arm with Si particle reinforced aluminum based metal composite material

“…Hence, significant number of papers in literature have mentioned mechanical properties affected by the particle volume fraction. [17][18][19][20][21][22][23] Particle volume fraction and particle size are very important in terms of fatigue performance in particle reinforced MMCs. Fatigue life is increasing while increasing the particle volume fraction due to reduced stress concentration in the matrix material.…”

Constructing a two-level computational model of cross-ply fiberglass-reinforced plastic from micromechanical testing

“…This method is used to determine hardness, interphase zone, creep, damage, the elastic modulus, the material hardening curve, etc. [21][22][23][24][25][26][27][28][29][30] The use of experimentally obtained mechanical properties at the micro level enables us to determine the mechanical properties of the constituents of a composite without information containing defects (pores, cracks) present in macroscopic test specimens among the sampling data. Another important issue in constructing multilevel deformation models is the determination of the size of a representative volume, which reflects ongoing processes associated with material deformation and fracture.…”