In powder bed fusion additive manufacturing, the volumetric energy density E V is a commonly used parameter to quantify process input. However, recent results question suitability of as design parameter, varying contributing parameters may yield different part properties. Herein, beam current, scan velocity, and line offset in electron (PBF-EB) titanium aluminide alloy TNM–B1 are systematically...

Aluminide coating is prepared on K438 Ni-based superalloy by pack cementation. The hot corrosion test of as-received and pre-oxidation aluminide in Na 2 SO 4 salt are carried out at 1050°C. morphologies, phase composition, products characterized XRD, SEM, EDS, TEM. conclusion that the has excellent properties. After corrosion, oxide scale thinnest maintains good integrity. However, fluctuates g...

In this study, aluminide coating was employed to enhance the high-temperature cyclic oxidation of Rene-80 superalloy at 950ºC. The microstructural aspects and phase constituents of samples were  investigated with scanning electron microscopy (SEM) and x-ray diffraction (XRD) techniques. The result of oxidation tests showed that the weight gain in the uncoated sample was considerably higher than...

The aim of this study was to understand how consolidation and homogenisation, as well the possibility integrating two processes, influences pre-compression microstructure subsequent compression behaviour an industry accepted, peritectic solidifying titanium aluminide ingot alloy; 45XD. This differs from existing work with its emphasis on understanding effect homogenisation workability, these pr...

Ambient-temperature fracture toughness and fatigue crack propagation behavior are investigated in a wide range of (g 1 a2) TiAl microstructures, including single-phase g, duplex, coarse lamellar (1 to 2 mm colony size (D) and 2.0 mm lamellar spacing (l)), fine lamellar (D ; 150 mm, l 5 1.3 to 2.0 mm), and a powder metallurgy (P/M) lamellar microstructure (D 5 65 mm, l 5 0.2 mm). The influences ...