Microstructure evolution in rapidly solidified Y added TiAl ribbons

Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd

“…Although this study cannot reveal whether the addition of Gd changes the temperature of formation of the lamellae, the effect of cooling rate can be excluded because the samples were taken from similar positions in the two ingots. Very recently, Liu et al [31] also demonstrated that rare earth element e Y plays a role in the grain refinement of rapidly solidified TiAl ribbons.…”

The Structural and Phase State of the TiAl System Alloyed with Rare-Earth Metals of the Controlled Composition Synthesized by the “Hydride Technology”

“…Previous studies supposed that the addition of yttrium [18] and gadolinium [19][20][21][22] could significantly reduce the grain sizes and lamellar spaces of TiAl alloys, enhance strength and plasticity at room temperature, as well as creep resistance at high temperatures. However, the mechanisms of microstructure refinement in the rare-earth metals-modified (REM-modified) TiAl alloys were studied insufficiently because of the complex succession of solidification and solid-phase transformations of TiAl during thermal treatment and cooling [23].…”

Microstructural Characterization of Melt Extracted High-Nb-Containing TiAl-Based Fiber

“…RS has been performed on binary TiAl alloys by different methods [ 16 ]. For RS, a single roller melt-spinning technique with circumferential velocities of 10–30 m/s has been utilized to produce TiAl ribbons [ 17 , 18 ]. However, the ribbon thickness, which affects cooling rate, is easily influenced by the melt temperature, and the mechanical properties of ribbon is limited by the defects of the surface [ 19 , 20 ].…”