Variant selection during secondary twinning in Mg–3%Al / É. Martin in Acta materialia, Vol. 58 N° 11 (Juin 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 3970–3983 Titre : Variant selection during secondary twinning in Mg–3%Al Type de document : texte imprimé Auteurs : É. Martin, Auteur ; L. Capolungo, Auteur ; L. Jiang, Auteur Année de publication : 2011 Article en page(s) : pp. 3970–3983 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Twinning Double twinning Magnesium EBSD Variant selection Résumé : Secondary twin formation during the tensile deformation of Mg–3.4%Al–0.33%Mn was studied by means of the electron backscatter diffraction technique. This was employed to identify the particular variants that formed in each grain. For this purpose, the variants were characterized with respect to the orientation of the parent grain rather than that of its host primary twin. This approach led to a regrouping of the 36 possible variants into four sets, namely SA, SB, SC and SD, consisting of variants that are geometrically equivalent. A statistical analysis revealed that the observed secondary twins were almost entirely of SA and SD type (misorientations of 37.5° and 69.9°, respectively). The former variant is shown to require the least accommodation strain within the parent grain and to have the greatest potential for growth. Formation of the SD variant, in contrast, can be attributed to its being favored by the highest resolved shear stresses, i.e., it obeys Schmid’s law. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001722 [article] Variant selection during secondary twinning in Mg–3%Al [texte imprimé] / É. Martin, Auteur ; L. Capolungo, Auteur ; L. Jiang, Auteur . - 2011 . - pp. 3970–3983. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 3970–3983 Mots-clés : Twinning Double twinning Magnesium EBSD Variant selection Résumé : Secondary twin formation during the tensile deformation of Mg–3.4%Al–0.33%Mn was studied by means of the electron backscatter diffraction technique. This was employed to identify the particular variants that formed in each grain. For this purpose, the variants were characterized with respect to the orientation of the parent grain rather than that of its host primary twin. This approach led to a regrouping of the 36 possible variants into four sets, namely SA, SB, SC and SD, consisting of variants that are geometrically equivalent. A statistical analysis revealed that the observed secondary twins were almost entirely of SA and SD type (misorientations of 37.5° and 69.9°, respectively). The former variant is shown to require the least accommodation strain within the parent grain and to have the greatest potential for growth. Formation of the SD variant, in contrast, can be attributed to its being favored by the highest resolved shear stresses, i.e., it obeys Schmid’s law. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001722

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire