Intermetallic gamma titanium aluminides display attractive engineering properties at high temperatures of up to 750 °C. To date, they have been used in low-pressure turbine blades and turbocharger rotors advanced aircraft automotive engines. This review summarizes the fundamental information Ti–Al system. After providing development γ TiAl alloys, typical phases, microstructures their character...

High-speed machining of γ-TiAl alloy is a significant challenge due to high cutting temperatures. From the perspective environmental protection and improving tool life, appropriate cooling strategies should be adopted. Compared with dry conventional flood conditions, feasibility in cryogenic LN2 conditions was discussed. The force, wear its mechanism, surface roughness, as well sub-surface morp...

The low cycle fatigue (LCF) properties of the TiAl alloy Ti-43Al-5V-4Nb (at.%) with triplex microstructure have been investigated. LCF tests were conducted at room temperature, 600 °C and 760 °C. result shows that test temperature has a small influence on life evaluated by total strain range. On contrast, stress range had good correlation ultimate tensile strength each temperature. Though elong...

Five partial isothermal sections of the Ti–Al–Si system up to 70 at% Al and 40 Si have been determined experimentally between 800 1200 °C. Seven alloys were heat-treated for 24–1504 h characterized utilizing scanning electron microscopy, probe microanalysis, X-ray diffraction, differential thermal analysis. No ternary phase was found ?Ti, ?Ti, Ti 3 Al, TiAl, TiAl(1d-APS), TiAl 2 , are in equili...

    Y-TiAl intermetallic alloy have a good potential for use as biomaterial, due to its good corrosion resistance. In this paper, two fundamental electrochemical techniques namely electrochemical impedance spectroscopy and potentiodynamic anodic polarization were used to evaluate the corrosion performance of g-TiAl in Ringer's solution. Surface modification treatments were employed with the pur...

Nanoscale multilayer nitride coatings deposited by advanced PVD techniques have shown particular promise in improving the tribological properties of a number of modal alloy steels [1]. In this study, we report the effect of temperature on the friction and wear behaviour of a CrAlYN/CrN multilayer coating with a CrAlYON/CrON topcoat deposited on γ-TiAl. Deposition was performed by unbalanced mag...