Abstract
The microstructures and the mechanical properties of TC21 titanium alloy obtained through step-quenching were investigated. The samples were solution treated at 900℃ for 0.5 h, and then the step-quenching experiments with temperature from 600℃ to 60℃ were carried out. The microstructure characteristics, hardness and tensile mechanical properties were studied. The results show that the width of secondary α lath gradually decreases from 600℃ to 400℃, and nearly remains constant from 400℃ to 60℃. The variation of the macro-Vickers hardness is the same as that of βtrans matrix. The elongation and the reduction of area slowly increase with the increasing of the quenching temperature. The Vickers hardness, yield strength and tensile strength increase with the decreasing of the width of secondary α lath. The microstructure with a good combination of strength and ductility was obtained through the step-quenching at 300 and 400℃.
| Original language | English |
|---|---|
| Pages (from-to) | 1260-1266 |
| Number of pages | 7 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 48 |
| Issue number | 4 |
| State | Published - 1 Apr 2019 |
Keywords
- Mechanical properties
- Microstructure
- Secondary α lath
- Step-quenching