A study of the cycle oxidation behavior of the Cr/Mn/Mo alloyed Ti–48Al–based intermetallics prepared by ECAS

Archives of Metallurgy and Materials

“…The positive effects of these elements can be explained by considering various factors: when an alloying element with a higher valence than that of Ti is incorporated in the scale, oxygen vacancy concentration in the TiO 2 lattice decreases via a mechanism called doping effect in accordance with the 1 SAkArYA AppLied SCieNCe UNiverSiTY, TeCHNOLOGY FACULTY, depArTmeNT OF meTALLUrGY ANd mATeriALS eNGiNeeriNG, eSeNTepe CAmpUS, 54187, SAkArYA-TUrkeY 2 SAkArYA AppLied SCieNCe UNiverSiTY, TeCHNOLOGY FACULTY, depArTmeNT OF COmpUTer eNGiNeeriNG, eSeNTepe CAmpUS, 54187, SAkArYA-TUrkeY * Corresponding author: yigitgarip@hotmail.com principle of maintaining the electroneutrality [4], decrease of O diffusion and solubility in the substrate resulting in enhanced scale-substrate adherence [12], As a result of increasing Al activity, the formation of the protective Al 2 O 3 layer can be supported on the alloy surface. As far as mechanical characteristics are concerned, it is worth mentioning that the addition of Nb and Ta alloying elements decrease the creep rate as they are slower diffusers in the TiAl alloys [16].…”

“…intermetallics are defined as solid phases consisting of two or more metallic or semi-metallic elements with an ordered structure and generally well-defined and a fixed stoichiometry [1]. One of these compounds, based on titanium aluminide intermetallic, has drawn attention as a material for high-temperature applications due to a combination of outstanding properties such as high melting point, low density, adequate high specific strength, creep resistance and elastic modulus as well as good oxidation and corrosion resistance [2][3][4][5]. in addition, these materials have better thermal conductivity compared to ceramics and offer ductility while maintaining their structural stability under service conditions [6].…”

“…The approach of modifying the chemical composition of TiAl alloys with the addition of alloy elements is a simple and highly effective method [10]. many investigations have been done concerning the oxidation behavior of ternary or quaternary alloying elements added TiAl alloys and mo, W and Nb elements have been reported to enhance the high temperature oxidation behavior of TiAl alloys [4,[12][13][14][15].…”

A Short Review on the Phase Structures, Oxidation Kinetics, and Mechanical Properties of Complex Ti-Al Alloys

“…Therefore, the substitution of Ti 4+ with high cation valence elements such as Mo 6+ , W 6+ , and Nb 5+ reduced the oxygen vacancies and effectively prevented the growth rate of TiO 2 . In contrast, the addition of Cr 3+ increased both the oxygen vacancies and the growth rate of TiO 2 [ 30 ]. However, the detrimental effect of Cr addition on the oxidation resistance could be reduced by increasing the Cr content to more than 8 at.% [ 31 , 32 ].…”

Toz metalurjisi ile üretilen CoCrFeNiAl YEA'nın NaCl erimiş tuz içindeki sıcak korozyon davranışı

“…Moreover, another advantage of this method is that it can prevent chemical heterogeneity, provide microstructural control and offer a highly dense microstructure with refined grains. Development of these achieves at fast heating rates and in short sintering durations, without compromising mechanical properties [12][13][14][15][16][17]. Considering the above considerations, the RS method provides a more innovative and convenient way to produce HEAs compared to other conventional processes.…”