Precipitation Behavior and Microstructural Evolution of α Phase during Hot Deformation in a Novel β-Air-Cooled Metastable β-Type Ti-B12 Alloy

The precipitation behavior and microstructural evolution of α phase in a novel metastable β-type Ti alloy, Ti-10Mo-6Zr-4Sn-3Nb (wt.%), during isothermal compression are investigated this study through the use SEM (scanning electron microscope), TEM (transmission microscope) (HRTEM) (high-resolution transmission microscopy) EBSD techniques. results show that some finer precipitates randomly distributed within β matrix hot deformation. morphological characteristics distinctly different from those same solution-plus-aging treatment. volume fraction precipitate gradually increases with increased true strain. A large proportion precipitated phases prone to be at HAGBs (high-angle grain boundaries) LAGBs (low-angle On contrary, only small amount spherical is grain. crystallographic orientation relationships for most formed grains similar, whereas boundaries significantly different. Ti-B12 alloy considerably influenced by density dislocations.