Effect of ternary additions on mechanical properties of TiAl

The effect of zirconium addition on sintering behaviour, microstructure and creep resistance of the powder metallurgy processed alloy Ti–45Al–5Nb–0.2B–0.2C

“…With the exception of 1Zr and 2Zr that suffered from higher porosities, a trend of increasing hardness with additions of Zr was determined. These results agree with the already published information regarding Zr as an efficient solid solution strengthening element [6,17]. In fact, Kawabata et al [17] reported an increase from 300 MPa to 400 MPa in bend fracture stress for the ternary system Ti-Al-Zr with Zr contents of 2 and 6 at.%, respectively.…”

“…The element Zr at varying contents was chosen due to the large increase of strength reported in ternary alloys Ti-Al-Zr [17] and the high solubility in titanium (α and β phases) [18] and titanium aluminides (α 2 and γ phases) [19]. TNB-V5 was chosen as reference alloy due to its balanced mechanical properties and excellent creep resistance [20,21].…”

Study of effect of Mn addition on the mechanical properties of Ti2AlC/TiAl composites through first principles study and experimental investigation

“…Then, we believe that if the alloying element, which is beneficial to the ductility of the TiAl alloy, is added to the Ti 2 AlC/TiAl composites, the composites could possess high strength and good ductility simultaneously. According to the literatures [14,15], the alloying element Mn could effectively improve the ductility of the TiAl alloy. Thus, we believe that it also would be beneficial to the ductility of the TiAl matrix composites.…”

Long term microstructural stability of intermetallic Ti-46Al-8Ta alloy during ageing at temperatures of 700-800 °C

“…The change of both the lattice parameters of the γ M and γ phases during the precipitation of α/α 2 laths and subsequent long-term ageing (Fig. 7a) can be attributed to the redistribution of alloying elements, mainly to an increase of Al content in the γ phase [15][16][17].…”