Mao Xiqin, Ou Meigui, Chen Desong, Yang Ming, Long Wei
College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
Key Laboratory for Materials Structure and Strength of Guizhou Province, Guizhou University, Guiyang 550025, China.
Materials (Basel). 2021 May 24;14(11):2776. doi: 10.3390/ma14112776.
Two-phase TC21 titanium alloy samples were solution-treated at 990 °C (β phase zone) and cooled by furnace cooling (FC), air cooling (AC), and water quenching (WQ), respectively. The second solution stage treatment was carried out at 900 °C (α + β phase zone), then aging treatment was performed at 590 °C. The influence of the size and quantity of the α phase on the properties of the sample were studied. The experimental results showed as the cooling rate increased after the first solution stage treatment, wherein the thickness of primary layer α gradually decreased, and the tensile strength and yield strength gradually increased. After the second solution stage treatment, the tensile properties of samples increased due to the quantity of layers α increased. The aging treatment promoted the precipitation of the dispersed α phase and further improved the tensile strength. After the third solution stage treatments, the FC samples with more β-phase had the best comprehensive mechanical properties.
