Hysteretic behaviour of a Cu–Zn–Al single crystal during superelastic shear deformation

Orgéas, Laurent; Vivet, Alexandre; Favier, Denis; Lexcellent, Christian; Liu, Yinong

doi:10.1016/j.scriptamat.2004.04.033

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…To take this into account, the concept of memorized particular points is used in our model. Orge´as et al (2004) describe this concept. A special loop cycling is depicted in Figure 7 with this behavior.…”

Section: Kinetic Equations and Minor Loopsmentioning

confidence: 99%

Modeling Rearrangement Process of Martensite Platelets in a Magnetic Shape Memory Alloy Ni2MnGa Single Crystal under Magnetic Field and (or) Stress Action

Gauthier

Lexcellent

Hubert

et al. 2007

Journal of Intelligent Material Systems and Structures

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The aim of the article is the modeling of the rearrangement process between martensite variants in order to use magnetic shape memory alloys (MSMs) as actuators. In the framework of the thermodynamics of irreversible processes, an efficient choice of the internal variables to take into account the magnetic and mechanical actions and a free energy function are stated. The behavior is chosen as magnetically reversible and mechanically irreversible. An equivalence between magnetic field action H and uniaxial stress action for the initiation of the rearrangement is established. Finally, model predictions are compared with experimental measurements.

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Section: Kinetic Equations and Minor Loopsmentioning

confidence: 99%

Modeling Rearrangement Process of Martensite Platelets in a Magnetic Shape Memory Alloy Ni2MnGa Single Crystal under Magnetic Field and (or) Stress Action

Gauthier

Lexcellent

Hubert

et al. 2007

Journal of Intelligent Material Systems and Structures

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“…These two trends can be explained by three underlying phenomena. First, the hysteresis associated with forward and reverse stress-induced martensitic transformations increases with the maximum strain applied during a cycle [42,43,44]. However, this phenomenon should be of second order given the small volume fractions of transformed wire estimated above.…”

Section: Influence Of the Fiber Content And The Maximum Compression S...mentioning

confidence: 97%

“…CuZnAl alloys [43,44]. As for these systems, the present entanglements follow the concept of "erasable micromemory" also known as the "return point memory" or "discrete memory" effect [47,48,49].…”

Section: Similar Behavior Was Observed In Superelastic or Ferroelasti...mentioning

confidence: 99%

Entangled single-wire NiTi material: A porous metal with tunable superelastic and shape memory properties

et al. 2015

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International audienceNiTi porous materials with unprecedented superelasticity and shape memory were manufactured by self-entangling, compacting and heat treating NiTi wires. The versatile processing route used here allows to produce entanglements of either superelastic or ferroelastic wires with tunable mesostructures. Three dimensional (3D) X-ray microtomography shows that the entanglement mesostructures are homogeneous and isotropic. The thermomechanical compressive behavior of the entanglements was studied using optical measurements of the local strain field. At all relative densities investigated here (similar to 26-36%), entanglements with superelastic wires exhibit remarkable macroscale superelasticity, even after compressions up to 25%, large damping capacity, discrete memory effect and weak strain-rate and temperature dependencies. Entanglements with ferroelastic wires resemble standard elastoplastic fibrous systems with pronounced residual strain after unloading. However, a full recovery is obtained by heating the samples, demonstrating a large shape memory effect at least up to 16% strain

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“…The conventional two-phase superelasticity in crystalline SMA possesses several major drawbacks, i.e. : highly nonlinear hysteretic behaviour, strongly dependent on the stress or deformation rates [12,13], not stable with stress cycling, and with strong temperature dependence of the superelastic loop and critical stress values [4,10,11]. While the Ti-Ni [6] seems attractive having 100% recovery and a quasilinear behaviour, though it possesses small elastic strain values (4%) at very high stress values above 1GPa.…”

Section: Introductionmentioning

confidence: 99%

Giant elasticity in the Ni-Mn-Ga single crystalline FSMA martensites

Glavatskyy

Glavatska

2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract. The phenomenon of the giant elastic completely reversible linear strain is found at constant temperatures in Ni-Mn-Ga martensites. Single crystals of some off-stoichiometric Ni-Mn-Ga compositions possess rubber-like behavior in the martensite phase with completely elastic strain reaching over 10% at some 90MPa compressive stress at room temperature. The observed phenomenon is different from the conventional (two-phase) superelasticity, since it is found completely in the martensite phase and no intermartensitic reaction is observed during the load-unload cycling. The main features of the observed rubber-like behavior are: 1) complete elasticity and giant values of the strains achieved; 2) the linear character of stress-strain dependence; 3) excellent stability to the mechanical cycling, stress rate and temperature variation, in contrast to the conventional two-phase superelasticity due to the stress induced martensite transformation. Current work is directed to study the structural mechanisms of the found phenomenon by means of the neutron diffraction in-situ under compressive stress cycling.

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Hysteretic behaviour of a Cu–Zn–Al single crystal during superelastic shear deformation

Cited by 6 publications

References 19 publications

Modeling Rearrangement Process of Martensite Platelets in a Magnetic Shape Memory Alloy Ni2MnGa Single Crystal under Magnetic Field and (or) Stress Action

Modeling Rearrangement Process of Martensite Platelets in a Magnetic Shape Memory Alloy Ni2MnGa Single Crystal under Magnetic Field and (or) Stress Action

Entangled single-wire NiTi material: A porous metal with tunable superelastic and shape memory properties

Giant elasticity in the Ni-Mn-Ga single crystalline FSMA martensites

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