The habit plane, shape strain and orientation relationships associated with the formation of orthorhombic yi' martensite plates in Cu-14.95 at.?/, Sn alloys have been measured. The results are compared with the predictions of the phenomenological theory of martensitic transformations first by assumi
The complementary strain for the b.c.c. to orthorhombic martensite transformation in Cu-Sn alloys
โ Scribed by N.F Kennon
- Publisher
- Elsevier Science
- Year
- 1972
- Weight
- 714 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0001-6160
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โฆ Synopsis
Accurate measurements of the shape strain associated with the formation of two orthorhombic martensite plates in Cu-15 at. o/0 Sn have been made.
The measurements are examined using the recently proposed double shear theory of martensitic transformations and it is shown that for this transformation the hypothesis that the complementary strain is composed of two strains, appears to be untenable.
DEFORMATION
COMPLEMENTAIRE POUR LA TRANSFORMATION C.C.C. ORTHOROMBIQUE MARTENSITIQUE DANS LES ALLIAGES Cu-Sn Des mesures precises de la variation de forme associee a la formation de deux plaquettes de martensite orthorombique dens Cu-15 at. 'A Sn ont Bte effect&es. L'auteur examine ces mesures a l'aide de la theorie du double cisaillement proposee recemment pour les transformations martensitiques, et montre que, pour cette transformation, l'hypothese selon laquelle la deformation complementaire est composee de deux deformations semble insoutenable. DIE KOMPLEMENTARE DEHNUNG BE1 DER MARTENSITISCHEN UMWANDLUNG B.C.C.-ORTHORHOMBISCH IN Cu-Sn-LEGIERUNGEN Die mit der Bildung van zwei orthorhombischen Martensitplatten in Cu-15 At. % Sn verbundene Gestaltsanderung wurde sehr genau gemessen. Die Messungen werden anhand der ktirzlich vorgeschlagenen Doppelscherungstheorie der martensitischen Umwandlung ausgewertet und es wird gezeigt, daB fur die vorliegende Umwandlung die Hypothese, da6 die komplementiire Dehung aus zwei Dehnungen zusammengesetzt ist, unhaltbar erscheint.
* ill, A,, 13, etc. are scalar coefficients.
๐ SIMILAR VOLUMES
Decomposition and ordering processes in b.c.c. binary alloys are calculated by a pairwise interaction model. The interaction energy includes two terms due to a negative interchange energy V between the 1st neighbouring atoms which represents the ordering tendency and due to a positive interchange en