Excellent high-temperature strength and ductility of graphene oxide reinforced high-temperature titanium alloy matrix composite fabricated by hot isostatic pressing and heat treatment. (February 2022) - Chen, Hang
Abstract: GO reinforced high-temperature titanium alloy matrix composite with excellent high-temperature strength and ductility was successfully fabricated by hot isostatic pressing and heat treatment. After solution and aging treatment, the high-temperature strength of the composite was significantly improved because the increase of in-situ TiC at the interface enhanced interface bonding and the microstructure changed from equiaxed structure to bimodal structure. At the same time, the dissolution of silicides increased the high-temperature ductility. After solution at 1075 °C and aging at 700 °C, the tensile strength, yield strength and elongation at 600 °C of the high-temperature titanium alloy with 0.3 wt% GO reached 749 MPa, 571 MPa and 18.5%, respectively. Graphical abstract: Image 1 Highlights: GO reinforced titanium matrix composite with excellent high-temperature strength and ductility was fabricated by HIP and heat treatment. The main reason for the significant improvement of high-temperature strength was the in-situ TiC enhanced interface bonding. The dissolution of silicides after solution and aging treatment improved the high-temperature ductility.