Superplastic Ti alloys can be formed at temperatures as low as 750 C

https://doi.org/10.1016/j.ijplas.2023.103694

A team of Chinese researchers from the CAS Institute of Metals and the Royal Melbourne Institute of Technology designed and prepared a new titanium alloy with a multiphase nano-network structure. The new titanium alloy  utilizes the nano-beta network in the matrix to promote micro-nanocrystalline α-grain slippage and tilting, and utilizes the nano-Ti2Cu phases pinned along the α/βphase boundary to improve the stability of this nano-network structure, which comprehensively enhances the superplastic deformation ability of the material. This organizational design allows the material’s superplastic deformation temperature to drop by about 250°C compared to Ti6Al4V alloys, and an elongation of more than 900% can be obtained at 750°C and a strain rate of up to 1s-1, implying that the material’s strain rate for superplastic deformation has been increased by two to four orders of magnitude compared to existing materials.

The present work is considered to be of great significance in developing more economical and efficient superplastic deformation processes.

Superplastic Ti alloys can be formed at temperatures as low as 750 C
Scroll to top