Influence of the Si content on the microstructure and mechanical properties of Ti–Ni–Cu–Si–Sn nanocomposite alloys

Comparative Effect of Rapid Dendrite Growth and Element Addition on Microhardness Enhancement of Fe-Based Alloys

“…As reported, the hardness of Ti-based alloys increased with the addition of Si content due to the formation of metallic silicides Ti 2 Ni 2 Si and Ti 5 Si 3 which were also used as reinforcement material in Feand steel-based alloys. 33 In some aluminum alloys, Si particles in the form of primary Si and eutectic Si phases served as dislocation generation sites. As Si content increased, the more refined dispersed Si particles and grain refinement by the increased Si particles resulted in the high increment of hardness.…”

“…Si element improves the hardness of alloys commonly in two ways: (i) precipitation hardening, in which Si precipitates in the manner of high-strength metallic silicide or Si phase; (ii) solid solution hardening, in which Si exists as a solute. As reported, the hardness of Ti-based alloys increased with the addition of Si content due to the formation of metallic silicides Ti 2 Ni 2 Si and Ti 5 Si 3 which were also used as reinforcement material in Fe- and steel-based alloys . In some aluminum alloys, Si particles in the form of primary Si and eutectic Si phases served as dislocation generation sites.…”