OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 4 2023 Fig. 11. Graph for dependency of displacement (mm) on load (kN) of the foam aluminium material specimen Fig. 11 shows the deformation of aluminium foam. The displacement of the specimen is directly proportional to the applied load up to 700 KN. When a load is applied, the specimen can be broken into pieces, while the porous structure is damaged. The maximum observed compressive load is 760 KN, and the maximum displacemrnt is 17 mm. The offset percentage is 51 %. Conclusions An aluminium foam material was developed using calcium carbonate as a foaming agent. It was not necessary to additionally introduce a stabilizer into the molten metal, since a material that increases viscosity is formed during decomposition. A mechanized stirrer was used to form metal foam. The developed foam material has a higher compressive and impact strength compared to the parent solid material. For the developed foam material, the following can be noted: ● The developed metal foam has a strength-to-weight ratio 67 % higher than that of the parent material. ● The pore size ranges from 0.075 mm to 1.43 mm, which allows the metal foam to better absorb impact energy. ● The hardness of the foam material is 52 HRB higher than that of the parent solid material. ● The foam material demonstrates higher compressive strength (607 kN) compared to the parent metal (497 kN). ● Due to its low density and high compressive strength, the developed foam material will be useful in the automotive industry, where a lightweight material with high strength is required. References 1. Broxtermann S., Su M.M., Hao H., Fiedler T. Comparative study of stir casting and infiltration casting of expanded glass-aluminium syntactic foams. Journal of Alloys and Compounds, 2020, vol. 845, p. 155415. DOI: 10.1016/j.jallcom.2020.155415. 2. Banhart J. Light‐metal foams history of innovation and technological challenges. Advanced Engineering Materials, 2013, vol. 15 (3), pp. 82–111. DOI: 10.1002/adem.201200217. 3. Banhart J., Seeliger H.‐W. Aluminium foam sandwich panels: manufacture, metallurgy and applications. Advanced Engineering Materials, 2008, vol. 10 (9), pp. 793–802. DOI: 10.1002/adem.200800091. 4. Karuppasamy R., Barik D., Sivaram N.M., Dennison M.S. Investigation on the effect of aluminium foam made of A413 aluminium alloy through stir casting and infiltration techniques. International Journal of Materials Engineering Innovation, 2020, vol. 11 (1), pp. 34–50. DOI: 10.1504/IJMATEI.2020.104790.
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