Effect of hot forging on microstructure and tensile properties of Ti–TiB based composites produced by casting

Abstract

of the original manuscript: Imayev, V.; Gaisin, R.; Gaisina, E.; Imayev, R.; Fecht, H.-J.; Pyczak, F..: Abstract Microstructure and mechanical behavior of near eutectic Ti-1.5 wt.% B and hypereutectic Ti-2B wt.% B composite materials obtained by casting have been investigated. Commercially pure titanium was used as a matrix material. Homogeneously distributed TiB whiskers were revealed in the as-cast composite materials. Multiple isothermal 2-D forging of the composites was carried out in the temperature range of the beta phase field. The hot forging led to effective alignment of boride whiskers with retaining a high aspect ratio. Tensile mechanical tests in ascast and forged conditions were carried out at room and elevated temperatures. The composites demonstrated much higher strength in comparison with the matrix material without drastic ductility reduction. The effect of boride orientation and morphology on the tensile properties of the composite materials is discussed.

Effect of High-Pressure Torsion on Structure and Microhardness of Ti/TiB Metal–Matrix Composite

“…Precipitation hardening also increased during deformation due to shortening of the reinforcements ( Figure 5). More homogeneous distribution of the TiB particles can also give some effect in the mechanical properties, however more likely it can result in an increase in ductility [16,17,22] rather than in a pronounced strengthening.…”

“…Thermomechanical treatment can considerably improve ductility and strength and decrease ductile-to-brittle transition temperature of MMCs [15][16][17][18]. However, the microstructure evolution of MMCs during deformation under different conditions has not been studied comprehensively so far [19].…”

The Microstructural Characterization and Mechanical Properties of 5 vol. % (TiBw + TiCp)/Ti Composite Produced by Open-Die Forging

“…Hot working of the TMCs is usually used to refine the microstructure and improve the distribution of reinforcements [16,17].…”

Влияние температуры деформации осадкой на формирование мелкозернистой структуры литого сплава системы Ni-Mn-Ga

“…В частности, эти данные необходимы для планируемой пластической деформации исследуемых сплавов методом всесторонней изотермической ковки (ВИК). Известно, что с помощью этого метода воз-можно получение модифицированной зеренной струк-туры, кристаллографической текстуры и внутренних напряжений в различных металлах и сплавах [26][27][28]. Отличием данного метода обработки от описанных выше состоит в том, что обрабатываемый образец имеет сравнительно большие размеры.…”