Abstract Scope |
Ti-24Nb-4Zr-8Sn (wt.%, Ti2448) is a novel metastable β titanium alloy which has attracted significant attentions in recent years as a promising bio-medical used vanadium free titanium alloy, due to its combination of excellent properties, such as ultra-low modulus, great ductility, and excellent biocompatibility. Both twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) have been found in Ti2448, which plays important role in improving the ductility of Ti2448. In this work, the microstructure of solution-treated and cold-rolled Ti2448 alloy has been systematically investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A large number of hierarchical deformation twins were observed in Ti2448 after the cold rolling process, including primary {332}<113> deformation twin and secondary {112}<111> deformation twin. Interestingly, some unusual twinning substructures were characterized in Ti2448 via TEM, which will be introduced in detail in this presentation. |