187. iron-aluminum metallic-intermetallic laminate (mil) composites
Name: Haoren Wang
Grad Year: 2019
Metallic-intermetallic laminate composites can be fabricated via hot pressing alternating stacked metal foils. The reactive sintering of dissimilar metals can form intermetallic compounds, which typically have high modulus and high hardness, but are often brittle. Tailoring the initial metal foil thickness, reaction temperature and time can produce laminate composites with alternating metallic and intermetallic layers, which combine ductility from residual metallic layers and stiffness from the intermetallic layers. Iron and aluminum are two of the lowest cost structural metals, so studying MIL composites in the iron-aluminum system may facilitate developing high-performance structure materials at low cost. Specifically, among various intermetallic compounds in the Fe-Al system, the FeAl phase (B2) has similar lattice structure with BCC-iron, and possesses the best mechanical properties of the intermetallic phases, making it an ideal intermetallic layer material. This presentation will demonstrate a processing path to the formation of Fe-FeAl MIL composites with unique mechanical performance.
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