The mechanical properties, fracture morphology and microstructure of TB15 titanium alloy after solution cooling at 900℃×2h and aging at 530℃×8h were investigated by scanning electron microscope observation, tensile test and fracture toughness test.
The results show that the effect of solution cooling on the strength and ductility of TB15 titanium alloy is relatively large, and the effect on fracture toughness is small. After solid solution, when refilled with 0.1MPa argon vacuum air cooling, the comprehensive mechanical properties of the alloy are the best. /2. With the increase of solution cooling rate, the fracture toughness of TB15 titanium alloy gradually decreases, but the change is not too large. Under different solution cooling methods, the number, thickness and interlamellar spacing of secondary α phase of TB15 titanium alloy after solution aging will change differently. Compared with air cooling, the number of lamellar secondary α-phases in backfilling 0.1MP argon vacuum air cooling increases, the thickness increases slightly, and the lamellar spacing increases.