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Superplasticity studies in a beta titanium alloy

Tan M. J., Zhu X. J., Thiruvarudchelvan S., Liew K. M.

Archives of Materials Science and Engineering

2007

Vol. 28, nr 12

717-721

Purpose: In the present study, the Superplastic Forming and deformation behavior as well as related mechanisms of this titanium alloy were investigated. Design/methodology/approach: The high temperature deformation of a beta titanium alloy (Ti-15V-3Cr-3Sn-3Al) was studied in this work. Uniaxial tensile tests were carried out at 650, 750, 850 and 950°C with an initial strain rates from 10 -1 s -1 to 10 -4 s -1. The effects of temperatures and initial strain rates on the superplasticity of this alloy were studied. Findings: The studies showed that dynamic recrystallization took place during high temperature deformation and this process not only decrease the average grain size of the alloy but also increase the misorientation angle. Microstructure evolution during high temperature forming as well as related mechanisms were also investigated. Practical implications: The investigation of microstructure of beta titanium alloy as related phenomens during high temperature deformation are important for achieving desired mechanical behavior of the material. Originality/value: The Superplasticity studies in a beta titanium alloy as well as related mechanism are investigated.