Browsing by Keyword "TMCs"
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Item PM Based Titanium Matrix Composites for Aerospace Applications: Processing, Mechanical Properties and Scale Up: Processing, mechanical properties and scale up(2017) Lagos, M.A.; Agote, Iñigo; Atxaga, G.; Pambaguian, L.; EXTREMATThe reinforcement of titanium with a hard phase is an efficient way to increase the stiffness and strength of conventional titanium alloys. The high reactivity of titanium is a critical challenge in the processing of Titanium Matrix Composites (TMCs). For this reason, Powder Metallurgy is considered a very promising route for the manufacturing of TMCs. In this work, a master alloy (Ti-TiC) was developed by combustion synthesis. This alloy was further blended with conventional titanium alloy and the final consolidation was performed by Spark Plasma Sintering. In addition to the processing details, microstructural and thermomechanical characterization is presented. Materials obtained present higher Young Modulus and strength than conventional Ti-6Al-4V, with higher thermal conductivity and maintaining similar thermal expansion coefficient (CTE). The good corrosion resistance of the material makes it a candidate for possible applications in aerospace. This work presents also the scale up of the process to obtain aerospace demonstrators.Item Study on the effect of processing method and type of reinforcements on titanium matrix composite properties(European Powder Metallurgy Association (EPMA), 2014) Agote, I.; Lagos, M. A.; EXTREMATTitanium and its alloys are very attractive materials for advanced applications. However, further improvements are needed to make them competitive with high-strength steels or Ni-based alloys. This demand continues to drive material development efforts to explore new concepts like titanium matrix composites (TMCs). Specifically, the presence of reinforcement in titanium alloys can significantly increase their stiffness, being very interesting for structural applications This work evaluates the properties of TMCs using different reinforcements and a novel processing method. Two types of reinforcements (TiB and TiC) were obtained by SHS where a highly loaded master alloy (80% of TiB or TiC) mixed with Ti-6Al-4V was produced. They were ground and diluted with more Ti-6Al-4V powder to obtain the final TMC compositions. Finally, samples were sintered using Spark Plasma Sintering. The microstructure and crystallographic phases of the reinforcements and TMCs are presented. Preliminary mechanical properties of TMCs are detailed and compared with Ti-6Al-4V.