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Faceted interfacial structure of {1011} twins in Ti formed during equal channel angular pressing

Abstract

The boundary structure of {1011} deformation twins formed in commercial pure titanium (CP-Ti) during the initial pass ECAP processing has been studied by TEM and HRTEM. A new twining mode with twinning dislocation of b3/3, has been identified by a dichromatic diagram method. The new mode of {1011} twin has substantially higher interface energy and accommodates more shear strain during deformation than the conventional b4 twinning mode. The deviation angle between the habit trace of the twin boundary and the theoretical twinning plane, K1, is dependent upon the density of twin dislocations.
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Category

Academic article

Language

English

Author(s)

  • Yanjun Li
  • Yongjun Chen
  • John Walmsley
  • Stéphane Dumoulin
  • Ragnvald Mathiesen
  • Hans Jørgen Roven

Affiliation

  • SINTEF Industry / Materials and Nanotechnology
  • Norwegian University of Science and Technology

Year

2010

Published in

Scripta Materialia

ISSN

1359-6462

Volume

62

Issue

7

Page(s)

443 - 446

View this publication at Norwegian Research Information Repository