Simultaneously enhanced strength and ductility of titanium via multimodal grain structure

Received 17 May 2010; received in revised form 13 June 2010; accepted 5 July 2010. published online 12 July 2010.

Commercial Ti with a multimodal grain structure was successfully produced using cryorolling, followed by low-temperature annealing. This multimodal grain structure Ti exhibited a combination of high yield strength (926MPa), a uniform elongation of 11% and a failure elongation of 23%. The strength enhancement was mainly derived from the ultrafine equiaxed grains, while the improved ductility originated from the large fraction of high-angle grain boundaries and the multimodal grain structure.

Keywords: High strength, Ductility, Ti, Multimodal structure

Institute for Technology Research and Innovation, Deakin University, Waurn Ponds, Victoria 3217, Australia

ARC Centre of Excellence for Design in Light Metals, Clayton, Victoria 3217, Australia

Corresponding author at: Institute for Technology Research and Innovation, Deakin University, Waurn Ponds, Victoria 3217, Australia. Tel.: +61 3 5227 3354; fax: +61 3 5227 1103.

PII: S1359-6462(10)00461-6

doi:10.1016/j.scriptamat.2010.07.010

11 of 13