Fatigue and fracture of damage-tolerant In Situ titanium matrix composites

Abstract

In an effort to engineer damage-tolerant ingot metallurgy (IM) in situ titanium matrix composites with attractive mechanical properties, the fatigue and fracture properties of a range of high-modulus titanium alloys reinforced with TiB whiskers were examined. The strengthening effects due to elastic whisker reinforcement are quantified using shear lag and rule-of-mixture models. The effects of alloy composition and microstructure on the fatigue behavior of the in situ titanium composites will also be discussed.

Mechanical Properties of <I>in situ</I> Synthesized Titanium Matrix Composites at Elevated Temperature

“…Compared with outside doping technique, in situ technique is very attractive for their properties such as isotropic behavior, easy to fabricate, economical and convenient to fabricate parts of complex shape. Powder metallurgy, 4,5) casting, 6,7) mechanical alloying 8) and rapid solidification 9,10) processing have been used to fabricate particle reinforced TMCs.…”

Deformation and fracture properties of damage tolerant in-situ titanium matrix composites

“…The TiB whiskers behind the crack tip and within the plastic wake were intact. Toughening of the in-situ Ti-6AI-4V-0.5B composite can at least partly be ascribed to the elastic bridging of the TiB whisker reinforcements, details of which can be found elsewhere [38].…”

Microstructural characterization of Y2O3 in in situ synthesized titanium matrix composites

“…Over the past few years particle reinforced titanium MMCs have been produced using various techniques, particularly using powder metallurgy [1,2] and liquid phase (casting) [3] processing routes. In recent years, novel processing techniques [4][5][6][7][8][9][10][11][12][13][14][15] based on the in situ production of MMCs have emerged. In situ techniques are valuable to fabricate Ti MMCs with better properties because they overcome the shortcoming of traditional techniques.…”