Abstract
Near β titanium alloys present better formability at moderate temperatures compared to α-β alloys. On the other hand, the strength of the forged workpiece is markedly increased after heat treatments by α-phase precipitation hardening. These properties make these high strength Ti-alloys attractive for aircraft and aerospace components. In this work, the formability of Ti-10V-2Fe-3Al is studied. Hot compression tests with cylindrical specimens are performed by means of a Gleeble® 1500 machine at temperatures below β-transus (788 °C) and at constant strain rates of 0.01, 0.1 and 1 s-1. The flow curves show a continuous softening at 0.1 and 1 s-1 after an initial stress peak, and steady flow at low strain rate (0.01 s-1). The evolution of the microstructure for specimens deformed to different strain levels is examined. A quantitative analysis of SEM images is carried out to determine the distribution, shape and content of α phase before and after deformation. The local strain within the compression specimens is determined by a finite element method and correlated to the microstructure.
| Original language | English |
|---|---|
| Pages (from-to) | 473-477 |
| Number of pages | 5 |
| Journal | Journal of Materials Processing Technology |
| Volume | 177 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 3 Jul 2006 |
Keywords
- Alpha phase morphology
- Flow curves
- Hot deformation
- Near beta titanium alloys
- Quantitative metallography
- Ti-10-2-3
ASJC Scopus subject areas
- Ceramics and Composites
- Modelling and Simulation
- Computer Science Applications
- Metals and Alloys
- Industrial and Manufacturing Engineering
Fields of Expertise
- Advanced Materials Science