FLOW BEHAVIOUR AND MICROSTRUCTURAL EVOLUTION OF TITANIUM Ti-10V-2Fe-3Al ALLOY DURING HOT COMPRESSION TEST | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 37, Volume 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., May 2012, Pages 1-14 PDF (1.52 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2012.36942 | ||
| Authors | ||
| H. Al-Salihi; C. Bettles; B. Muddle | ||
| ARC Centre of Excellence for Design in Light Metals, Monash University, Melbourne, Australia. | ||
| Abstract | ||
| ABSTRACT Hot workability characteristics and microstructural evolution of Ti-10V-2Fe-3Al alloy have been investigated extensively by means of hot compression tests over a practical range of temperatures from 760°C to 870ºC with strain rates (0.01, 0.1, and 1) s-1. Activation energy was obtained (using the peak stress values) to determine the material constants and subsequent Zener-Holloman parameter. The dependence of peak stress on the deformation temperature and strain rate obeys a hyperbolic sine equation with the Zener- Holloman parameter. The results show that higher activation energy was observed at a temperature of 800°C. Microstructural observations of the deformed samples show elongated grains with a recovered structure at lower temperatures. However, recrystallized grains were observed obviously at 810°C, 850°C and 870°C, at a strain rate of 1s-1. Furthermore, there was a gradual increase in the fraction of recrystallized grains as the deformation temperature increased at higher strain rate. Fracture behaviour during hot compression test was also investigated optically in terms of surface cracks at different deformation conditions. In terms of this damage behaviour, surface cracks were observed at 760°C with higher strain rate1s-1. | ||
| Keywords | ||
| Activation energy; recrystallization; damage; Titanium | ||
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