Microstructural characterization of nitrided beta Ti–Mo alloys at 1400 °C

In this work, the two Ti92Mo8 and Ti84Mo16 alloy compositions were gas nitrided at 1400 °C. The microstructure and the chemical composition of the gas nitrided surfaces were investigated by scanning electron microscopy and by electron probe microanalysis. Two internal needle-like nitride precipitates, α-(Ti,N) and δ-TiN0.3, were observed. Their crystallographic orientation relationships in the β matrix were determined by electron backscattering diffraction.