MICROSTRUCTURE AND MECHANICAL PROPERTIES OF A (TiB + TiB2 + TiC)/Ti‒6Al‒4V COMPOSITE MATERIAL FORMED IN THE PROCESS OF IN SITU SYNTHESIS IN SELECTIVE LASER MELTING

A study has been made of the physicomechanical properties of a heterogeneous material based on TiB, TiB₂, TiC, and B₄C ceramics and a Ti‒6Al‒4V metal alloy formed by the method of selective laser melting. Consideration has been given to the infl uence of TiB, TiB₂, TiC, and B₄C ceramic particles produced by in situ synthesis in the process of laser action on the microstructure and hardness of the formed metal-matrix composite. Basic mechanisms of variation in the microstructure to form secondary ceramic inclusions were discussed and microhardness measurements at a macro- and nanolevel were carried out. It has been established that ceramic particles formed as a result of the in-situ synthesis improve sharply the hardness of the metal-matrix composite depending on the composition of the ceramics.
   
Author:  A. A. Golyshev, A. G. Malikov, V. M. Fomin, A. A. Filippov, A. M. Orishich
Keywords:  laser welding, titanium alloy, aluminum–lithium alloy, destruction, thermography of destruction of the weld, elemental-phase composition
Page:  1793