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A New Variant Selection Criterion for Twin Variants in Titanium Alloys (Part 1)

✍ Scribed by Christophe Schuman; Lei Bao; Jean Sébastien Lecomte; Yudong Zhang; Jean Marc Raulot; Marie Jeanne Philippe; Claude Esling

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 497 KB
Volume: 13
Category: Article
ISSN: 1438-1656
DOI: 10.1002/adem.201100119

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✦ Synopsis

Abstract

A new selection criterion to explain the activation of the twinning variant is proposed based on the calculation of the deformation energy to create a primary twin. The calculation takes into account the effect of the grain size using a Hall‐Petch type relation. This criterion allows to obtain a very good prediction for the variant selection. The calculations are compared with the experimental results obtained on T40 deformed by Channel Die compression.

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## Abstract An in depth analysis on twin variant selection and twin growth character during compression by means of “interrupted in situ” EBSD orientation measurement was carried out. An experimental verification and geometrical analysis of the use of Schmid's law as a criterion for selecting twin