High Strength of Aluminium-Based Composites by Different Methods of Severe Plastic Deformation (SPD)

Abstract

Composite materials were applied to meet the demands of production efficiency on industrial because they offered the superior properties both of aspects on mechanical and physical properties were constantly being refined and developed with several methods. Composite technology with aluminum as a matrix as well as ceramic materials as reinforcement was very dependent on a result of the perfection of the manufacturing process on the matrix material and reinforcement was used. Aluminum currently still dominates as a matrix because of its ductility, while reinforcing materials that are widely used are ceramic elements such as silicon carbide (SiC) and alumina (Al2O3). Using of SiC/Al2O3 has been widely studied because of the remarkable improvement of the mechanical properties it produces. The addition of number of SiC particles to Al2O3 was able to significantly increase the hardness properties. In this study, a number of composite manufacturing methods were compared from the results of properties by accumulative press bonding (APB), accumulative roll bonding (ARB), and repetitive press roll forming (RPRF). The mechanical properties of RPRF results are known to produce better properties, especially mechanical properties. Mechanical properties were observed from tensile and hardness tests. The finer grain size is produced by increasing the compression cycle and increasing the mechanical properties when adding double reinforcement of the SiC/Al2O3, which causes the strength and hardness of the RPRF results to increase. Whereas other methods such as APB and ARB it is not compatible with composite materials, this proves that the RPRF method was very suitable for processing composite materials compared to APB and ARB methods.

Analysis of Stress Distribution of Composites Based on Hydroxyapatite by Finite Element Method

“…If related to the normal stress value, of the three maximum main stress values, there is no maximum main stress value that exceeds the normal stress value, so no failure occurs in all samples. In Figure 5 it can be seen that the results of pressure on research (11)(12)(13) did not fail in the 3 samples.…”