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

Published online by Cambridge University Press:  24 September 2013

Alexander V. Polyakov ,
Irina P. Semenova ,
Ruslan Z. Valiev ,
Yi Huang  and
Terence G. Langdon
Alexander V. Polyakov
Affiliation:
Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, K. Marx St., 12, Ufa 450000, Russia
Irina P. Semenova
Affiliation:
Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, K. Marx St., 12, Ufa 450000, Russia
Ruslan Z. Valiev
Affiliation:
Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, K. Marx St., 12, Ufa 450000, Russia
Yi Huang*
Affiliation:
Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK
Terence G. Langdon
Affiliation:
Materials Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK; Departments of Aerospace and Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1453
*
Address all correspondence to Yi Huang at[email protected]
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Abstract

A Grade 4 titanium was processed by equal-channel angular pressing (ECAP)–Conform and drawing to produce an ultrafine grain (UFG) size of ~180 nm. Some samples were tested in this condition (UFG-1) and others were annealed for 1 h at 623 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 623 K.

Type
Research Letters
Information
MRS Communications , Volume 3 , Issue 4 , December 2013 , pp. 249 - 253
Copyright
Copyright © Materials Research Society 2013 

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