Wire-arc additive manufacturing (WAAM) is a common metal 3D printing technique that offers several benefits, including the high rate of deposition, cheap price, and efficacy for complex parts. Even though (WAAM) has demonstrated its ability to meet the demands of manufacture components on medium-to-large size made of (Al) for the automotive and other related industries, WAAM cannot currently use as a complete production procedure due to practical issues such as mechanical properties that aren’t matched and the presence of significant residual stresses. the AM technologies offer promising new benefits with the MMCs as a solution for some challenges. This article reviews the MMCs Mixing technique and their critical issues, AM classification, WAAM process with advantages and challenges. also reviews WAAM of some AMCs with different reinforcements and power sources. The results of the study of the influence of reinforcement particles on the structure showed that they were changed grains structure from the columnar dendrite to equiaxial dendrites after the solidification and improves hardness.

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The powder metallurgy (PM) method was used to create the alloy. The sintering process was carried out in an inert high-temperature tube furnace in the presence of inert gas at a temperature of 1000 ° C for 8 hours (Argon). In this article, the effect of (B) at three wt.% (0.4,0.8,1.2) on the corrosion rate, hardness, and microstructure of alloys was examined. X-ray diffraction (XRD), open circuit potential, electrochemical tests (Tafel extrapolation method), and Macro hardness Brinell were used to study the effect of adding (B) in various amounts to alloys. Saliva was utilized as the corrosion solution for the testing. The inclusion of the alloy element (B) increased hardness and a decrease in particle size, as seen by the microstructures. Furthermore, the corrosion resistance of the master alloy improved next the addition, as shown by Corrosion potential has increased while corrosion current densities have decreased. The corrosion rate for A, A1, A2 and A3 was 14.50, 7.42, 2.03and 2.77 (mpy) respectively.

Aluminum-silicon foundry alloys at eutectic region have small range of freezing, good castability and good properties. Such alloys are used in many engineering applications like automobile, aeronautical and aerospace industries. In present work, aluminum-silicon eutectic samples with silicon of 12-13wt.% were prepared using stir casting method. The microstructure, hardness, porosity, dendrite grain size, tensile strength, and elongation were studied to see the effect of mechanical mold vibration on this eutectic alloy. An amplitude of 0.5 mm and frequency of 5,10,15,20 and 25 Hz were used for casting the samples with mechanical mold vibration. The results showed that the values of the amplitude and frequencies have significant effect on the studied properties. A decrease in dendrite grain size by used mechanical mold vibration, at frequencies(5,10,15,20 and 25)Hz the decreased by 15%, 26%, 32%, 42%, and 53%. The hardness was increased by used mechanical mold vibration, at frequencies(5,10,15,20 and 25)Hz the hardness increased by 7%, 16%, 25%, 33%, and 40%. Also, a decrease in porosity by used mechanical mold vibration, at frequencies(5,10,15,20 and 25)Hz the porosity decreased by 35%, 46%, 58%, 69%, and 77%. The increase in tensile strength by used mechanical mold vibration, at frequencies(5,10,15,20 and 25)Hz the increased by 12%, 18%, 25%, 29%, and 36%; and increase in elongation percentage by used mechanical mold vibration, at frequencies(5,10,15,20 and 25)Hz the increased by 14%, 29%, 38%, 52% and 71% respectively.