## 3 Results and Summary
### Summary  
This review's main objective was to take into account the work that has been performed regarding the fabrication of AMMCs using the 5 xxx series of aluminium magnesium alloys using only marine grades. The goal was to determine which reinforcement and base material are employed the most in the fabrication of AMMCs. According to the reviewed literature, AA5083 is the base material that is most frequently used to fabricate AMMCs using the FSP approach (see Figure 1). The fabrication of an AMMCs employing FSP, friction stir additive, and FSW has only been tried once with AA5059. The only base alloys that have not been used to make AMMCs using the FSP approach or any other method for fabricating a composite are AA5386, AA5436, and AA5454. The use of different reinforcements on various base materials is also shown in Figure 2, with SiC particles, CNTs, B4C, and TiO2 appearing to be the most commonly used reinforcements. As this study shows, there is less research on aluminium metal matrix composites fabricated using coal as reinforcements; thus, it will be beneficial for future studies to follow this direction.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Reference** & **Base Material** & **Reinforcement** & **Outcome** \\ \hline
[56] & Al5083 & CNT & Microstructural analysis showed smaller granules and non-uniform CNT dispersion in the stir zone. According to microhardness studies, the tiny grains and presence of CNT in the composite led to a hardness increase of up to 25\% when compared to unprocessed Al alloy. Electrochemical experiments revealed that an FSPed composite has somewhat greater corrosion resistance. \\ \hline
[57] & AA5083 & Cu & The XRD suggested that intermetallic compounds such AlCu\({}_{4}\), Al\({}_{2}\)Cu, and MgCu\({}_{2}\) formed. The improvement in surface composite hardness was induced by the diffusion of copper and the development of different hard intermetallic. The copper-reinforced stir zone microhardness distribution increased significantly from 77 HV to 138 HV. \\ \hline
[64] & AA5083 & SiC, Al\({}_{2}\)O\({}_{3}\) and SiC/Al\({}_{2}\)O\({}_{3}\) & The findings indicated that the addition of more ceramic particles raised the composite’s average hardness by 30\%. As ceramic powder SiC reinforcement was added this enhanced the wear resistance of AA5083-SiC by 40\%. At two FSP passes, the composites containing 50\% Al\({}_{2}\)O\({}_{3}\) and 50\% SiC had the maximum hardness. \\ \hline
[65] & AA5083 & Hybrid Reinforcement & There was intermetallic formation. Intermetallic phase development increased the composite’s hardness and wear resistance. \\ \hline
[66] & AA5083 & CNT + Al\({}_{2}\)O\({}_{3}\) & CNT’s presence facilitated work hardening. The presence of CNT/Al\({}_{2}\)O\({}_{3}\) limits the dislocation movement, improving the metal matrix’s hardness in the process. \\ \hline
[67] & Al5083 & CeO\({}_{2}\) and SiC & CeO\({}_{2}\) and SiC, at the perfect volume ratio of 75:25, were shown to have improved mechanical and corrosion properties for the composite. Al5083-SiC (25\%)-CeO\({}_{2}\) (75\%), a hybrid composite, was shown to have the best mechanical and corrosion properties. \\ \hline
[68] & Al5083 & B\({}_{4}\)C/TiC & Decreased wear rate for the hybrid Al5083-B\({}_{4}\)C/TiC composite was observed. \\ \hline
[69] & Al5083 & SiC and MoS\({}_{2}\) & Improved wear properties for Al5083 hybrid composites distributed with SiC and MoS\({}_{2}\) were obtained. \\ \hline
[70] & AA5083 & SiC, ZrO\({}_{2}\), and Gr & SiC, ZrO\({}_{2}\), and Gr particles were incorporated into the AA5083 alloy as reinforcement and used to increase the ultimate strength since the hybrid ratio of the reinforcement particles greatly altered the mechanical characteristics. \\ \hline
[71] & AA5083 & Sic & The FSP-processed composite’s maximum micro-hardness and tensile strength were determined to be 1.75 Gpa and 78 Mpa, respectively. \\ \hline \hline \end{tabular}
\end{table}
Table 1: Cont.