Influence of annealing on ductility of ultrafine-grained titanium processed by equal-channel angular pressing-Conform and drawing

Authors: Polyakov, A.V., Semenova, I.P., Valiev, R.Z., Huang, Y. and Langdon, T.G.

Journal: MRS Communications

Volume: 3

Issue: 4

Pages: 249-253

eISSN: 2159-6867

ISSN: 2159-6859

DOI: 10.1557/mrc.2013.40

Abstract:

A Grade 4 titanium was processed by equal-channel angular pressing (ECAP)-Conform and drawing to produce an ultrafine grain (UFG) size of ~180Â nm. Some samples were tested in this condition (UFG-1) and others were annealed for 1Â h at 623Â K (UFG-2). The grain boundaries are in a non-equilibrium condition after processing, but the annealing equilibrates the boundaries without any increase in grain size. This leads to significant differences in the mechanical behavior of UFG-1 and UFG-2 when they are tested at 293 and 623Â K. © 2013 Materials Research Society .

Source: Scopus