Mechanical alloying of Ti-Ni alloys under high pressure

Application of self-propagating high-temperature synthesis and mechanical activation for obtaining nanocomposites

“…Titanium solubility in copper and copper solubility in titanium were increased to 10% (at.) by applying strains to the alloys at high pressures [45]. Mechanical activation of Ti-Cu powder mixtures also enhances solubility: as was mentioned in the review [30], copper solubility in titanium in alloys obtained by the mechanochemical method can reach 10% (at.…”

“…As neither the X-ray analysis nor the electronmicroscope study revealed the formation of boride phases or intermetallides of the Ti-Cu system in mechanically activated samples, such products can be supersaturated solid solutions of titanium in copper and copper in titanium [30,45] whose formation is most probable if activation lasts longer than 3 min.…”

Thermal stability of Ti–44Al–8Nb–1B alloy

“…An addition of 8 at.% Nb causes considerable retention of primary b since Nb is a well recognised b-stabiliser [26]. The retained b can be removed by subsequent HIPping within a single aphase field, with the help of high pressure [27].…”

Dilatometric sintering study of Ti–50Ni elemental powders

“…Reaction synthesis, combustion synthesis or self-propagating high temperature synthesis (SHS), have been reported to produce TiNi intermetallic from elemental powders [3][4][5][6][7]. The nanocrystalline TiNi powders were produced by the mechanical alloying of Ti and Ni powders [8][9][10] and by the electro-explosion of TiNi wires [11]. Detailed study on sintering behaviour, dimensional and density changes as a function of compaction pressure and temperatures were reported by many investigators [3,4,[12][13][14][15].…”