Evaluation of defectiveness of porous titanium by non-destructive ultrasound techniques

Abstract

Based on the velocities of longitudinal ultrasonic wave propagation measurement, the presence of imperfect contacts (planar defects) in Ti compacts fabricated in the porosity range from 0.05 to 0.4 by cold compaction and following sintering at 773 to 1473 K has been evaluated. The elastic characteristics of the titanium at the porosity of 0.05 to 0.3, sintered at specific temperature, are found to be similar to those of human cortical bone. However, the planar defects concentration and following elastic anisotropy dramatically decrease with increase of sintering temperature to 1273 K and more in studied range of porosity and these sintering conditions may be recommended for fabrication of materials for biomedical applications.