Microstructure and tribological behavior of Ti–Si eutectic alloys with Al addition

Abstract

The effect of Al element alloying on the microstructure and tribological behavior of Ti-Si eutectic alloys has been studied. The experimental results show that Al element changes the microstructure from large eutectic cells that consist of layered tablet phases Ti 5 Si 3 and a-Ti (for the Al-free alloy) to near-equiaxed or rod-like Ti 5 Si 3 particle reinforced continuous a-Ti (Al, Si) solid solutions. This microstructural change greatly improves the ductility and reduces brittle fracture of massive superficial materials during wear process. Microplough and local delamination are the main wear mechanisms of Al-added Ti-Si alloys. Therefore, the wear resistance and friction stability are simultaneously improved.

Experimental study of Ti–Sn–Y system phase equilibria at 473K

“…; as a result they have got more and more attentions [1,2]. How to improve and make use of the excellent properties of Ti alloys and step up their practical applications has become a key problem.…”

Phase equilibria of the Zr–Ti–Si ternary system at 773 K

“…high strength, specific modulus and good corrosion resistance, etc., which makes Ti alloys attract more and more attentions [1][2][3][4]. In order to improve the combination properties of Ti alloys and step up their practical applications, complex alloying method is considered to be an important researching direction.…”

The phase equilibria in the Nd–Ti–Si ternary system at 773K

“…It has excellent mechanical properties, low density and good corrosion resistance, therefore is considered to be a promising candidate for application in many fields such as aerospace, petrochemical engineering, automobile and medical appliance [1,2]. However, its low room-temperature plasticity, induced by the essential brittleness of Ti 5 Si 3 intermetallic compound, has severely limited the development of this alloy.…”