Quantification and Statistical Analysis of Microstructural Features in As-Cast Ti-6Al-4V Titanium Alloy

Abstract

Based on microstructure of as-cast Ti-6Al-4V titanium alloy, an image processing to simplify model of β grain size, α lamella space was developed and a quantitative statistical method of β grain size, α lamella space in two-phase titanium alloys was established, with which β grain size and α lamella space of as-cast Ti-6Al-4V titanium alloy with different plate thickness were analyzed. The relationship between β grain size, α lamellar space and cast plate thickness was discussed. The results show that β grain size and α lamellae thickness nearly linearly increase as plate thickness increasing. β grain size has normal distribution and with cast plate thickness increasing, the dispersion gets larger.

Slip Activity During Low-Stress Cold Creep Deformation in a Near-Α Titanium Alloy

“…Different slip systems may exhibit the same slip lines at the sample surface, resulting in 'ambiguous' solutions' [51], in which case all possible solutions were reported. In these cases, relative displacement ratio (RDR) analysis can be used to determine the Burgers vector direction associated with the slip line [68,69]. If the Burgers vector matches with only one of the possible slip systems, an unambiguous solution can be reported.…”