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Comparison of Two Mechanical Alloying Synthesis of WMoTaNbCr and WMoTaNbTi

Ignacio Orellana Araya, Claudio Aguilar Ramírez*

Mechanical alloying is a route that prevents the common dendrite structure with segregation and avoids the problems related to the grain growth present in arc melting, besides allowing the alloying of elements with a high melting point at room temperature and limited solubility. In this study, the phase evolution of two refractory high entropy alloys was developed, WTaMoNbCr and WTaMoNbTi, in two different conditions of mechanical alloy: with detentions intervals and continuous mechanical alloying. The first one produces the face-centered cubic single solid solution WTaMoNbCr and WTaMoNbTi with lattice parameters 0.4313 and 0.4305 nm, respectively. The second mechanical alloying produced a widening of the lattice parameter to 0.4319 and 0.4325 nm of the WTaMoNbCr and WTaMoNbTi, respectively, due to the high contamination related to the process.