Study on Process Optimization and Performance of Foamed Magnesium Alloy Based on Melt Foaming Method
To enhance the performance of magnesium foam materials,the effects of adding Al elements and foaming time on the properties and pore structure of magnesium foam substrates in the preparation process were studied.This was further investigated for its influence on the mechanical properties of magnesium foam materials.Pure magnesium(Mg),pure aluminum(Al),and calcium(Ca)granules were selected as the basic materials.A Mg-10Al-3Ca matrix alloy was prepared using the melting casting method.Using this alloy as the raw material,2wt.％of SiC and MgCO3 particles were added respectively as a thickener and foaming agent.Under normal temperature and pressure conditions,magnesium foam was prepared using the melt foaming method.By optimizing the foaming time,mag-nesium foam materials with a porosity ranging from 56.56％to 73.15％were successfully prepared.The prepared magnesium foam speci-mens were characterized in detail using scanning electron microscopy(SEM),micro-area EDS energy spectrum analysis(EDS),X-ray dif-fraction(XRD),and other characterization methods.Mechanical property tests were conducted on the specimens using a universal testing machine.The results showed that the compressive strength of the Mg-10Al-3Ca matrix alloy prepared by adding Al elements reached 303.35 MPa.The magnesium foam material prepared by optimizing the foaming time had a maximum compressive strength of 30.55 MPa,a porosity of 56.56％,and an energy absorption capacity of 18.06 MJ/m3,exhibiting excellent pore structure and properties.
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