Deformation Mechanisms in Beta Titanium Alloys Thesis/dissertation

Deformation Mechanisms in Beta Titanium Alloys Thesis/dissertation

Deformation Mechanisms in Beta Titanium Alloys Thesis/dissertation

The general goal of this research is to obtain an understanding of the
influence of microstructural features on the monotonic and cyclic deformation
behavior of titanium alloys. Traditional methods of analysis, (S-N data,
crack growth studies) have failed to establish guidelines for improving
fatigue properties by alloy design. The experimental part of this program
is designed to provide quantitative property-microstructure relationships
by correlating both cyclic stress-strain response (CSSR) and crack propagation
data with microstructure and deformation mode. Previous work on this
contract has shown that the deformation mode (planar slip, multiple slip,
coarse twinning, and fine twinning) and ductility of Ti-V alloys can be
controlled to a large extent by controlling the solute content and volume
fraction of omega. Consequently, the system is a unique one for studies
directed at establishing the effect of microstructure and deformation mode
on the fatigue performance of titanium alloys.