Determining the Effects of Growth Velocity on Microstructure and Mechanical Properties of Ti-47Al Alloy using Electromagnetic Confinement and Directional Solidification

Stability of lamellar microstructures in a Ti–48Al–2Nb–2Cr alloy during heat treatment and its application to lamellae alignment as a quasi-seed

“…For heat treatment, samples with F8 mm  10 mm were cut from the ingot by electro-discharge machining. Besides, two types of raw bars were also cut from the ingot for Electromagnetic Confinement and Directional Solidification (EMCDS) process, by which large-scale TiAl sample without contamination could be obtained [11,12].…”

Effect of lamellae orientation on tensile properties of directionally solidified Ti–46Al–0.5W–0.5Si alloy

“…The lamellar structures with orientation parallel to the growth direction can be obtained using the directional solidification technology [8,[12][13][14][15][16]. At present, the influence of lamellar orientation on the mechanical properties of TiAl alloys is mainly the results of R. Chen [15][16][17][18][19][20][21], J. Shen [13,[22][23][24]] and Yamaguchi's research group [25][26][27]. Moreover, G. Chen et al [13] have reported that the DS Ti-45Al-8Nb (at.-%) alloy with aligned lamellar structures, which was prepared in an optical floating zone furnace, showed an average ductility of 6.9% and ultimate tensile strength (UTS) of 978 MPa at room temperature.…”

A Novel Directional Solidification of TiAl-Based Alloys by Electromagnetic Cold Crucible Zone Melting Technology with Y₂O₃ Moulds

“…14) It is noted that the Bridgman directional solidification process, with a ceramic mould, is an effective approach to not only improve the RT elongation and strength, but also to enable greater geometrical complexity. 3) To date, two types of heating mode have been typically used in this type of process, namely refractory resistance heating and graphite heating. 5,6) These are indirect heating mode, which means that the heating process occurs over a long period of time.…”