The effect of cold rolling and annealing on microstructure and tensile properties of the nanostructured Ni50Ti50 shape memory alloy

Sharifi, E. Mohammad; Karimzadeh, F.; Kermanpur, A.

doi:10.1016/j.msea.2014.03.128

Cited by 26 publications

(7 citation statements)

References 15 publications

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“…For state 1, the peaks have a low intensity. This is consistent with previous studies for coldworked NiTi [19,20]. These results will be used to model the plastic behavior of tubes.…”

Section: Thermal Transformation Behaviorsupporting

confidence: 91%

Superelastic cellular NiTi tube-based materials: Fabrication, experiments and modeling

Machado

Louche

Alonso

et al. 2015

Materials & Design (1980-2015)

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The authors wish to acknowledge the financial support of the French ANR research program ANiM: Architectured NiTi Material (N.2010 BLAN 90201)International audienceThe aim of this paper is to present an experimental and modeling study as the first step towards designing and optimizing architectured materials constituted of NiTi tubes. The idea is to combine the intrinsic and novel properties of nickel–titanium shape memory alloys with purposely engineered topologies. By joining thin-wall superelastic tubes via electrical resistance welding, we create regular cellular material demonstrators. The superelastic behavior of two simple architectured materials based on identical tubes, but with two topologies, are experimentally characterized and modeled using finite element approaches. The predicted behaviors are compared by simulating complex loading, exploring the influence of the constitutive material behavior on the effective mechanical properties of cellular materials. The parameters of the constitutive equations are identified on tensile tests performed on small dog-bone shaped specimens, machined from the tubes by spark cutting. The modeling results are finally compared with compression tests performed on these simple architectured NiTi materials. As a further validation of the proposed study, two large cell structures (square and hexagonal stacking) were modeled to gain greater insight into the role of different architectures

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“…For state 1, the peaks have a low intensity. This is consistent with previous studies for coldworked NiTi [19,20]. These results will be used to model the plastic behavior of tubes.…”

Section: Thermal Transformation Behaviorsupporting

confidence: 91%

Superelastic cellular NiTi tube-based materials: Fabrication, experiments and modeling

Machado

Louche

Alonso

et al. 2015

Materials & Design (1980-2015)

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“…It may be followed by annealing at a particular higher temperature. Sharifi et al [66] studied the effect of cold rolling on an equiatomic-NiTi SMA. Some samples with different thicknesses were produced at room temperature, where the stiffness was increased by reducing the thickness.…”

Section: Mechanical Treatmentsmentioning

confidence: 99%

The Effect of Different Parameters on Shape Memory Alloys

Qader

Kök

Dağdelen

et al. 2020

Sakarya University Journal of Science

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Shape memory alloys' characteristics are different from ordinary materials because they can memorize their predetermined shape, thus they are excellent candidates for different applications. In this review article, the most interesting parameters that researchers are using in their investigation have been highlighted. Also, the popular techniques used for the characterization of shape memory alloys have been described. The diagrams and sketches can show a clear view of metallurgies and related research areas.

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“…As a consequence, over the last few decades, many researchers have paid more attention to NiTiCu SMAs [9][10][11][12]. It is well known that plastic deformation substantially influences the microstructures and transformation behavior of NiTi-based SMAs [13,14]. In particular, thermomechanical processing, especially plastic working, is an important step in manufacturing NiTi-based SMA products [15].…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Microstructure Evolution of NiTiCu Shape Memory Alloy Subjected to Plastic Deformation at High Temperatures

Jiang

Sun

Zhang

et al. 2017

Metals

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Deformation behavior and microstructure evolution of NiTiCu shape memory alloy (SMA), which possesses martensite phase at room temperature, were investigated based on a uniaxial compression test at the temperatures of 700~1000 • C and at the strain rates of 0.0005~0.5 s −1 . The constitutive equation of NiTiCu SMA was established in order to describe the flow characteristic of NiTiCu SMA, which is dominated by dynamic recovery and dynamic recrystallization. Dislocations become the dominant substructures of martensite phase in NiTiCu SMA compressed at 700 • C. Martensite twins are dominant in NiTiCu SMA compressed at 800 and 900 • C. Martensite twins are not observed in NiTiCu SMA compressed at 1000 • C. The microstructures resulting from dynamic recovery or dynamic recrystallization significantly influences the substructures in the martensite phase of NiTiCu SMA at room temperature. Dislocation substructures formed during dynamic recovery, such as dislocation cells and subgrain boundaries, can suppress the formation of twins in the martensite laths of NiTiCu SMA. The size of dynamic recrystallized grains affects the formation of martensite twins. Martensite twins are not easily formed in the larger recrystallized grain, since the constraint of the grain boundaries plays a weak role. However, in the smaller recrystallized grain, martensite twins are induced to accommodate the transformation from austenite to martensite.

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The effect of cold rolling and annealing on microstructure and tensile properties of the nanostructured Ni50Ti50 shape memory alloy

Cited by 26 publications

References 15 publications

Superelastic cellular NiTi tube-based materials: Fabrication, experiments and modeling

Superelastic cellular NiTi tube-based materials: Fabrication, experiments and modeling

The Effect of Different Parameters on Shape Memory Alloys

Deformation Behavior and Microstructure Evolution of NiTiCu Shape Memory Alloy Subjected to Plastic Deformation at High Temperatures

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