Internal Friction and Elastic Constants of Sintered Titanium

Internal Friction and Elastic Constants of Sintered Titanium

Using aMarx-oscillator standing-wave resonancemethod, we measuredthe internal friction &' of sintered titanium containing up to 26 volume-percent voids (c). The surprising &I-versus-c curve shape, an exponential increase, lead us to remeasure &I-versus-c by acoustic-resonance spectroscopy, which gave similar results. We hypothesized that both void shape and void size change with c. For the void...

Internal Friction Transient Effects of Titanium Hydrogen Solid Solution

The internal friction of pure Ti between 500K and700K is constant at 10-4 when measured during a continuous increase of temperature. In opposite when the temperature is increased stepby step, each increase of 10K induces immediatly a raising up of 4 10-4 internal friction. During the following stage at the new temperature the internal friction falls slowly down to its initial value. This behavi...

Lattice and elastic constants of titanium–niobium monoborides containing aluminum and vanadium

First-principles electronic structures were used to compute the lattice and elastic constants of single-crystal TiB and NbB and changes with Nb, Ti, Al and V solutes. The data were built into an interpolation formula for lattice and elastic constants of the quartenary (TiNbAlV)B with dilute Al and V concentrations. The lattice and elastic constants of borides in two Ti alloys containing Nb and ...

Martensitic Transformation and Elastic Constants

Characterization of loose powder sintered porous titanium and Ti6Al4V alloy

Porous titanium and Ti6Al4V alloy, biomedical candidate materials for use in orthopedic and dental implants, were manufactured by sintering the powders at various temperatures in loose condition. The characteristics of the corresponding powders and utilized sintering temperatures limited the final porosities in the range 30-37.5 vol. %. Similar to wrought alloys, compression stress-strain curve...