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Effects of spark plasma sintering–hot pressing and TiB2 reinforcement on interfacial bonding, texture evolution, and mechanical properties of hot-rolled Ti/Al/Ti laminates
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DOI：10.1007/s10853-026-13479-0.png)
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Abstract
En 中文
Ti/Al metallic laminates are attractive lightweight structural materials, but their broader application is limited by deformation incompatibility between layers, interfacial oxidation, and the strength–ductility trade-off associated with Al grain coarsening during thermal processing. Ti/Al/Ti laminates were fabricated by spark plasma sintering–hot pressing (SPS-HP) under vacuum, followed by hot rolling at 500 °C, to systematically elucidate how the SPS-HP temperature governs the microstructure, texture evolution, interfacial bonding, and mechanical performance. The rolled Al layer develops a pronounced through-thickness heterogeneity, consisting of a fine-grained interfacial region dominated by shear deformation and a coarse-grained core characterized by rolling texture. Increasing the SPS-HP temperature suppresses the interfacial shear texture while slightly strengthening the core rolling texture. SPS-HP at 550 °C markedly reduced oxide-related interfacial features and provided the best strength–ductility balance, whereas higher temperatures promoted the formation of discontinuous TiAl2 at the interface. We further show that introducing TiB2 particles (up to 6 vol%) into the Al layer weakens the texture gradient, refines the grains, and improves deformation compatibility between Ti and Al. The interfacial bonding strength reaches a maximum at 3 vol% TiB2. These findings establish a clear processing–structure–property relationship in Ti/Al-based laminates and provide a practical strategy for designing high-performance lightweight metallic composites.
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3.9
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3.2W
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7.2W
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