The Ti/TiAl metal-intermetallic laminates were fabricated by hot-pressing starting from the elemental Ti and Al foils. The final microstructures of laminates consist of alternating layers of ductile Ti and brittle intermetallic. The relationships between mechanical properties and layer sequence of Ti/TiAl laminates have been studied by examining the effects of solid solubility of Al in Ti layer, the volume fraction of intermetallic layer and the interlayer spacing. In these three cases, the samples with the best performance are obtained and among them the optimal sample is confirm with fracture strength 752MPa, KIC 48MPa·m1/2. In particularly, a novel theoretical formula of strength calculation is proposed according to the mixing rule of composites. The theoretically calculated results agree well with the experimental results.
Materials & design – Elsevier
Published: Apr 5, 2018
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