Microstructural characteristics and mechanical properties of in situ synthesized (TiB+TiC)/TC18 composites

Influence of (TiC+TiB) on the microstructure and tensile properties of Ti-B20 matrix alloy

“…TiB whiskers in the composite primarily fracture and are seldom pulled out, which means that the reinforcement combines with the matrix very well and the energy is mainly consumed in the form of reinforcement fractures. This change negatively affects plasticity [10]. Fig.…”

Effect of ECAP numbers on microstructure and properties of titanium matrix composite

“…Moreover, Lu et al [7] investigated the reinforcements usually showed different shapes such as short-fiber shape, dendritic shape and equiaxed or near equiaxed shape by using common casting technology. Sun et al [8] reported that these reinforcements were on a large range of 2-50 lm, which dispersed in a homogeneous manner in the composite. To solve this problem, it is useful to use a severe plastic deformation technology to homogenize the reinforcements in the composite.…”

Ultrafine processing of (TiB+TiC)/TC18 composites processed by ECAP via Bc route

“…The ultrafine equiaxed grains of approximate 300 nm was obtained and the tensile strength can reach to 765 MPa [18]. In present paper, the matrix alloy is TC18 titanium alloy, served especially as high strength and high toughness in aeronautical application [19][20]. Microstructural characteristics and mechanical properties of in situ synthesized (TiB + TiC)/TC18 composites have been systematically studied in our former work and the result indicates that the strength, toughness and plasticity of the composite are superior to those of the TC18 alloy [20].…”

“…[24] . Besides the driving force for nucleation of trace reinforcements provided by the grain boundaries with unstable atomic arrangement, solute enrichment of boron (B) and carbon (C) forming in constitutional super cooling, in turn provides the driving force for nucleation and increases the nucleation rate of TiB particles [20]. As shown in the magnified image in figure 1…”

“…In present paper, the matrix alloy is TC18 titanium alloy, served especially as high strength and high toughness in aeronautical application [19][20]. Microstructural characteristics and mechanical properties of in situ synthesized (TiB + TiC)/TC18 composites have been systematically studied in our former work and the result indicates that the strength, toughness and plasticity of the composite are superior to those of the TC18 alloy [20]. To our knowledge, TiC particles were used to refine the grains of matrix in casting process [21] and impeded the growth of β grains, which is helpful for the formation of the substructures in the deformed phase [22].…”