Investigation on Microstructure and Tensile Fractography of RE Oxides (CeO2/Y2O3) Reinforced AZ91D Magnesium Matrix Composites

Abstract

The current work aims to investigate the mechanical properties of rare oxide reinforced Mg alloy based MMCs. Magnesium matrix considered in the study is AZ91D alloy, whereas rare earth oxides reinforced were CeO2 and Y2O3. The Y2O3 particulate reinforcement percentage was varied from 1 to 3% in the steps of 1% to study its influence on mechanical properties of MMCs. Stir casting route was adopted to fabricate sample for study. Microstructure analysis illustrated the uniform distribution of particulate in matrix alloys. The obtained results revealed the enhanced mechanical properties such as tensile strength, yield strength, elongation and hardness of MMCs due to increased percentage of reinforcement. Fractography analysis of fracture surfaces demonstrated the microcracks and cleavage were dominant in pure alloy. While particle debonding, extensive plastics deformation were prominent in-addition to microcracks in MMCs.

Mechanical Behavior and Sliding Wear Assessment of Al2024/TiC Metal Matrix Composite using Taguchi and Spotted Hyena Optimization

“…Wear resistance of aluminium (Al) alloys is poor, due to plastic deformation of smooth asperities at elevated temperatures [8]. Al composites with brittle reinforcements interact with the counterface and impart enhanced service life [9][10][11]. Increased resistance results in low asperity deformation, leading to wear surface abrasion [12].…”

Surrogate analytical models of damage localization in metal matrix composites

“…15,16,45 In this context, the iterative FE simulations that are carried out to parameter calibration purposes, consider the discretized version of the actual microstructure, which can be acquired through microscopy and micro-computed tomography techniques. [5][6][7][8][14][15][16]21,[46][47][48][49][50] Repetitive numerical analyses can also be carried out during the design phase of composite components, searching for the material characteristics that optimize the performance of the final product. Also in this case, the design space to be explored is often made of a few varying parameters.…”

“…15,16,45 In this context, the iterative FE simulations that are carried out to parameter calibration purposes, consider the discretized version of the actual microstructure, which can be acquired through microscopy and micro-computed tomography techniques. 5–8,14–16,21,46–50…”

Review and perspective on polyhedron model for estimating thermodynamic properties of oxides

“…Thermodynamic modeling of phase equilibria and chemical reactions in multicomponent systems is an indispensable part of the development of advanced materials and processes. Oxide-based materials have many applications, such as glass, 1 ceramics, 2,3 reinforcements in metallic matrix composites, 4 thin films and coatings, 5,6 materials for magnetic recording, 7 fuel cells, 8,9 hightemperature superconductors, 10,11 health, 12,13 cement, 14,15 energy storage, 16,17 water decontamination, 18,19 and process metallurgy. 20,21 Despite the large volume of data available, there are numerous important oxide compounds with unknown thermodynamic properties.…”