Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7976513 | Materials Science and Engineering: A | 2016 | 8 Pages |
Abstract
The low temperature superplastic deformation behavior of Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe alloy were investigated. Results show that the elongation of the alloy exceeds 100% when deformation at the temperature ranging from of 650 °C to 800 °C and the initial strain rates ranging from 2.78Ã10â4 sâ1 to 8.33Ã10â3 sâ1, and the elongation of the alloy increases with the decrease of initial strain rates and the increase of temperature. The true strain-stress curves show that the peak flow stress decreases with the decrease of initial strain rates and the increase of temperatures, and the peak flow stress shows much sensitivity to the initial strain rates as well as the temperatures. During superplastic deformation, the α phase was elongated and the size grows up with the decrease of initial strain rates. The superplastic mechanism of the alloy is grain boundary sliding accommodated by dislocation movement and dynamic recrystallization.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Zhaoxin Du, Jingshun Liu, Guowei Li, Kai Lv, Guolong Liu, Liangming Yan, Yuyong Chen,