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Effects of primary sintering on microstructure and properties of friction stir back extruded Cu-Ti2SnC wire composite

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Jahani A. , Jamshidi Aval H. , Rajabi M. , Jamaati R.

Archives of Civil and Mechanical Engineering

2023

tom Vol. 23, no. 2

art. no. e136, 2023

The present work investigated the effects of primary sintering on the microstructure, mechanical, electrical, and wear properties of the Cu-5vol%Ti2SnC wire composite fabricated by friction stir back extrusion process. The results showed that the grain size of the final product increased by performing a sintering treatment before the FSBE process. It is important to note that the grain size in the composite sample was coarser than the sample without reinforcement after the extrusion process. Furthermore, since the effect of temperature predominates over plastic strain, a coarser grain was formed in the composite samples. Compared to the center, the grain size of the near surface of extruded wires was slightly finer. By performing the sintering treatment and applying heat during the treatment, it is possible to form the Cu81Sn22 phase, which can increase the Cu81Sn22 phase content formed during FSBE. The interface quality was significantly improved by the sintering treatment before the FSBE process. The sintering treatment increased the strength, elongation, electrical conductivity, and wear resistance of Cu-Ti2SnC composite wire by 4, 13, 2, and 5%, respectively.