The influence of composition and processing on the structure and properties of TiAl-based alloys

Dynamic Fracture Initiation Toughness of a Gamma (Met-PX) Titanium Aluminide at Elevated Temperatures

“…Although they saw evidence of microstructural instability, they did not see any degradation in the mechanical properties of these alloys. However, these results were contrary to the findings of Loretto et al, [20] who reported that the microstructural changes were accompanied by a significant drop in mechanical properties as the a 2 phase changes to the c phase. Wright and Rosenberger [21] reported degradation in fatigue properties after hightemperature air exposure of certain gamma alloys tested at elevated temperatures, with the largest effect being in the temperature range 500°C to 550°C.…”

A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties

“…Furthermore, higher cooling rate (G.R) promotes greater undercooling, thus producing finer grains. Hence, the parameters (G/R) and (G.R) control the type of microstructure and the scale of the microstructure, respectively [136,137,139,140].…”

Creep behaviour and related high temperature microstructural stability of Ti–46Al–9Nb sheet material

“…Moreover, adjusting a fully lamellar microstructure necessitates a heat-treatment in the single a-phase field, followed by a controlled, but rather fast cooling through the (aCg) phase field [4][5][6][7][8], which leads to phase compositions far from thermodynamic equilibrium. This provides a driving force for thermal instabilities of the lamellar microstructure and consequently causes its microstructural changes which are reflected in dissolution of a 2 lamellae and dynamic recrystallization [1,[8][9][10][11][12][13][14]. In addition, for certain high-temperature applications, e.g.…”