Type II deformation twinning in γ′1 martensite in a Cu-Al-Ni alloy

Ichinose, S.; Funatsu, Yasuhiro; Otsuka, Kazuhiro

doi:10.1016/0001-6160(85)90155-5

Cited by 50 publications

(23 citation statements)

References 12 publications

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“…In the SME case, the maximum transformation work is on the variant with a type-I twin under uniaxial tension stress; and under uniaxial compression stress, the maximum transformation work is on the type-II twin variant. However, experiments demonstrate that most of the tension-stress-induced variants are of the type-II twin (Ichinose et al 1985, Okamoto et al 1986, Shield 1995, Zhang et al 1999, 2000. The experimental results in the present work indicate that the compression-stress-induced variants are of the type-I twin.…”

Section: Discussionsupporting

confidence: 43%

“…Thus using work as the phase transformation criterion and assuming that all 96 variants have the same resistance force W CR , it is impossible for the 48 type-II twin variants to appear under the applied stress. But in many experiments variants with a type-II twin were observed (Ichinose et al 1985, Okamoto et al 1986, Shield 1995. It was also found that the type-I twins are 2.5 times harder to move than the type-II twins in some materials (Ichinose et al 1991).…”

Section: The Maximum Transformation Work Criterionmentioning

confidence: 99%

“…(2) the microstructure determination of the parent phase and the different martensitic variants by using TEM, SEM, x-rays, etc (Otsuka and Shimizu 1969, 1974b, Otsuka et al 1974, Ichinose et al 1985, Okamoto et al 1986, Horikawa et al 1988; and (3) the micro-macro-related deformation measurement by using high-resolution moiré interferometry (Sun et al 1999a, b, Zhang et al 1999, 2000.…”

Section: Introductionmentioning

confidence: 99%

“…In the earlier literature, it was reported that the variants with a type-I twin were preferential under applied stress Shimizu 1969, 1974a). In some later papers, the type-II twin was determined to be the lattice invariant shear by using two surface analysesx-ray diffraction and the scratch technique (Ichinose et al 1985, Okamoto et al 1986. Recently it was found that the variants with both type-I and type-II twin were possible by a comprehensive comparison of the transformation strains and the A-M interface normals (Zhang et al 1998(Zhang et al , 1999(Zhang et al , 2000.…”

Section: Introductionmentioning

confidence: 99%

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The variant selection criteria in single-crystal CuAlNi shape memory alloys

Zhang

Brinson

Sun

2000

Smart Mater. Struct.

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Abstract. Two variant selection criteria are often used in shape memory alloys (SMAs). One is the maximum resolved shear stress (RSS) criterion and the other is the maximum transformation work criterion. In this paper these two measures are calculated using the crystallographic theory of martensite (CTM) for the shape memory effect (SME) case and the crystallographic theory of martensite + detwinning, distortion and slip (CTM + DDS) for the superelasticity (SE) case. The results are compared with the experimental measurements of a CuAlNi single-crystal SMA. The comparisons show that work is better as a variant selection criterion than RSS. In the SME case, type-II twin variants are more favorable under uniaxial tension; while type-I twin variants are more favorable under uniaxial compression. The calculation also shows that a great tension-compression asymmetry exists in CuAlNi single crystals.

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Section: Discussionsupporting

confidence: 43%

Section: The Maximum Transformation Work Criterionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The variant selection criteria in single-crystal CuAlNi shape memory alloys

Zhang

Brinson

Sun

2000

Smart Mater. Struct.

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“…Theoretically three types of twins are possible in this material: compound twins on {101} 2H plane, type I twins on {121} 2H plane and type II twin 2H plane. All three types of twins were observed experimentally [6][7][8]. According to the phenomenological theory of martensites [4,5,9] there is no solution for a 1 martensite and the austenite in Cu-Al-Ni alloys.…”

Section: Introductionmentioning

confidence: 99%

Cu-Al-Ni microstructure in the phenomenological theory of martensite with lattice invariant deformation

Ostapovets¹,

Paidar²,

Zárubová³

2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract. Geometrical analysis of interfaces in a Cu-Al-Ni alloy is performed on the basis of the phenomenological theory of martensite. The austenite-martensite interfaces in the foils of the Cu-Al-Ni alloy are faceted. In order to assess possible facet planes, lattice invariant deformation in the form of a simple shear is included into the phenomenological theory. The experimentally observed normals to the facet planes lie in the predicted regions. Experimentally observed lines in the intervariant interfaces are interpreted as slip steps. The directions of these lines agree with theoretical predictions.

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Diffusionless Transformations

Delaey

2013

Materials Science and Technology

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The sections in this article are Introduction Classification and Definitions General Aspects of the Transformation Structural Relations Pre‐Transformation State Transformation Mechanisms Microstructures Shape Changes Transformation Thermodynamics and Kinetics Shuffle Transformations Ferroic Transformations Omega Transformations Dilatation‐Dominant Transformations Quasi‐Martensitic Transformations Shear Transformations Martensitic Transformations Crystallography of the Martensitic Transformation Shape Deformation and Habit Plane Orientation Relationship Morphology, Microstructure and Substructure Crystallographic Phenomenological Theory Structure of the Habit Plane Thermodynamics and Kinetics of the Martensitic Transformation Critical Driving Force and Transformation Temperatures Nucleation Growth and Kinetics Transformation Hysteresis Materials Metallic Materials Ferrous Alloys Non‐Ferrous Alloys Non‐Metals Special Properties and Applications Hardening of Steel The Shape‐Memory Effect High Damping Capacity TRIP Effect Recent Progress in the Understanding of Martensitic Transformations Acknowledgements

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Type II deformation twinning in γ′1 martensite in a Cu-Al-Ni alloy

Cited by 50 publications

References 12 publications

The variant selection criteria in single-crystal CuAlNi shape memory alloys

The variant selection criteria in single-crystal CuAlNi shape memory alloys

Cu-Al-Ni microstructure in the phenomenological theory of martensite with lattice invariant deformation

Diffusionless Transformations

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