Hot deformation behavior of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy with acicular microstructure

Content Provider	Semantic Scholar
Author	Liu, Gao-Feng Zhang, Shang-Zhou Chen, Li-Qing
Copyright Year	2011
Abstract	The characteristics of hot deformation of an α+β titanium alloy Ti-6.5Al-3.5Mo-1.5Zr-0.3Si with acicular microstructure were studied using isothermal hot compressive tests in a strain rate range of 0.01–10 s−1 at 860–1 100 °C. The true stress-true strain curves of alloy hot-compressed in the α+β region exhibit a peak stress followed by continuous flow softening; whereas in the β region, the flow stress attains a steady-state regime. At a strain rate of 10 s−1 and in a wide temperature range, the alloy exhibits plastic flow instability. According to the kinetic rate equation, the apparent activation energies are estimated to be about 633 kJ/mol in the α+β region and 281 kJ/mol in the β region, respectively. The processing maps show a domain of the globularization process of α colony structure and α dynamic recrystallization in the temperature range of 860–960 °C with a peak efficiency of about 60%, and a domain of β dynamic recrystallization in the β region with a peak efficiency of 80%.
Starting Page	296
Ending Page	302
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1007/s11771-011-0694-6
Volume Number	18
Alternate Webpage(s)	https://page-one.springer.com/pdf/preview/10.1007/s11771-011-0694-6
Alternate Webpage(s)	https://doi.org/10.1007/s11771-011-0694-6
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article