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Selection criterion for {11 $\bar 2$ 2} twinning in rolled pure titanium

Published online by Cambridge University Press:  06 March 2017

Shun Xu ,
Christophe Schuman  and
Jean-Sébastien Lecomte
Shun Xu
Affiliation:
Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux (LEM3), CNRS UMR 7239,Université de Lorraine, F-57045 Metz, France Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (DAMAS), Université de Lorraine, France
Christophe Schuman*
Affiliation:
Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux (LEM3), CNRS UMR 7239,Université de Lorraine, F-57045 Metz, France Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (DAMAS), Université de Lorraine, France
Jean-Sébastien Lecomte
Affiliation:
Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux (LEM3), CNRS UMR 7239,Université de Lorraine, F-57045 Metz, France Laboratory of Excellence on Design of Alloy Metals for low-mAss Structures (DAMAS), Université de Lorraine, France
*
*(Email: christophe.schuman@univ-lorraine.fr)
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Abstract

Two sets of rectangle samples with different length/width ratios were prepared and subjected to uniaxial compression in the normal direction of rolled pure titanium. Results from Electron backscatter diffraction (EBSD) show that the produced {11 $\bar 2$ 2} twins in the two sets of samples exhibit different orientations, which is related to the variant selection of twinning behaviors with respect to the length/width ratios of the samples. The variant selection criterion is investigated in terms of the Schmid factors and contribution of the active twins to external strain, which indicates that the variants resulting in the elongation along the longer direction of the sample were unfavorable.

Keywords

TitaniumTwinningVariantDeformationSample size
Type
Articles
Information
MRS Advances , Volume 2 , Issue 27: Mechanical Behavior and Failure Mechanisms of Materials , 2017 , pp. 1455 - 1461
Copyright
Copyright © Materials Research Society 2017 

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