Multi-modality 3D visualization of hard-alpha in titanium billets utilizing CT X-ray and ultrasonic imaging

摘要

The objective of this research program is to develop a nondestructive visualization methdology to characterize hard alpha [1] in titanium billets. Hard alpha is a low density, hard brittle, stabilized alpha-phase region (inclusion) with high nitrogen and oxygen content in a titanium alloy. Hard alpha is often vided and cracked. The methodology will provide the ability to characterize the shape, size, orientation and composition (voiding, cracking, nitrogen content) of the hard-alpha inclusion so that these characteristics can be used as key input data for a flaw deformation model.