Influence of ?-phase stability in elemental blended Ti-Mo and Ti-Mo-Zr alloys

Stress-induced Transformations in Ti-mo Alloys

Phase transition and ordering behavior of ternary Ti – Al – Mo alloys using in - situ neutron diffraction

Neutron diffraction has been used for in-situ investigations to elucidate the phase transformation behavior of two Mo-containing TiAl alloys with compositions of Ti-44Al3Mo and Ti-44Al-7Mo (in at.%). Five different phases are present in these alloys. These include three ordered phases at room temperature, namely a2, b0 and c and two disordered phases, a and b, which occur at higher temperatures...

TRIBOLOGICAL PROPERTIES OF Ti-Si-Zr ALLOYS

Nowadays titanium alloys are extensively used for aerospace and biomedical applications. However, despite good mechanical properties and excellent corrosion resistance they possess poor wear resistance and a tendency to galling and seizure. In this study the tribological properties of experimental Ti-Si-Zr based alloys were studied using a standard ball-on-disc wear testing system. The wear and...

3(111) grain boundary of body-centered cubic Ti-Mo and Ti-V alloys: First-principles and model calculations

The energetics and atomic structures of 3[11̄0](111) grain boundary (GB) of body-centered cubic (bcc) Ti-Mo and Ti-V alloys are investigated using density-functional-theory calculations and virtual crystal approximation. The electron density in bcc structure and the atomic displacements and excess energy of the GB are correlated to bcc-ω phase stability. Model calculations based on pairwise inte...

Influence of boron vacancies on phase stability, bonding and structure of MB₂ (M  =  Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W) with AlB₂ type structure.

Transition metal diborides in hexagonal AlB2 type structure typically form stable MB2 phases for group IV elements (M  =  Ti, Zr, Hf). For group V (M  =  V, Nb, Ta) and group VI (M  =  Cr, Mo, W) the stability is reduced and an alternative hexagonal rhombohedral MB2 structure becomes more stable. In this work we investigate the effect of vacancies on the B-site in hexagonal MB2 and its influenc...