Equivalent thermo-mechanical treatments in an equiatomic Ti–Ni shape memory alloy

Chouf, S.; Morin, Michel; Belkahla, S.; Guénin, G.

doi:10.1016/j.msea.2006.02.117

Cited by 13 publications

(9 citation statements)

References 6 publications

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“…In spite of these superior properties, the cast ingots fall upon the low ductility, segregation, and poor or no capability of shape recovery. In order to overcome these shortcomings, the various processing routes including cold working, cold work‐annealing, and also severe plastic deformation methods have been successfully employed in previous researches . It has been found that the shape memory response, as the key functional property of the material, was significantly improved through cold working.…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Shape Memory Effect and Mechanical Properties in Thermomechanically Processed Semi‐Equiatomic NiTi Shape Memory Alloy

Zarei-Hanzaki

Abedi

2015

Adv Eng Mater

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The hot compression tests in a wide range of temperature were employed to produce the semi-finished products of equiatomic NiTi shape memory alloy holding enhanced mechanical properties. The precise analyses of the compensated flow curves and the microstructures indicated the occurrence of dynamic recovery at lower temperatures and dynamic recrystallization at higher temperature regime. In addition a significant influence on the critical transformation temperatures was also realized. This could affect the martensite plates' characteristics and the fraction of retained austenite phase. In consequence the room temperature mechanical properties and shape memory response of the alloy were influenced. In an elaborated optimized TMP scheme, the recovery ratio was increased from %30% to %80%.

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Section: Introductionmentioning

confidence: 99%

The Enhanced Shape Memory Effect and Mechanical Properties in Thermomechanically Processed Semi‐Equiatomic NiTi Shape Memory Alloy

Zarei-Hanzaki

Abedi

2015

Adv Eng Mater

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“…In this study, the acoustic microultrasound technique is used to characterize a so-called shape-memory material. There are several alloy families, the best-known ones are copper-based [1,4], iron-based [2] and Ti-Ni-based [3]. This study is established on the latter.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Shape-Memory Alloy Using Acoustic Techniques and Modelling of the Acoustic Signature $V(z)$

Larbaoui,

Benlachemi,

Boudour

et al. 2024

Metallofiz. Noveishie Tekhnol.

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This work focuses on the characterization of CuZnAl shape-memory alloy in its 3 states (austenitic, mixed, and martensitic) by a non-destructive technique to determine its elastic properties. This technique is based on the principle of acoustic microultrasound. It allows measuring the propagation velocities of the longitudinal, transverse, and Rayleigh acoustic waves, from which the elastic constants of the material (Young's modulus E, shear modulus G) are calculated. Thus, the obtained results of the measurements allow the modelling of the acoustic signature V(z) and the reflection coefficient R(θ) to compare the resulting Rayleigh velocities, which were modelled and measured experimentally in the different phases.

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“…Therefore, annealing after cold working is particularly important. It was reported that annealing at different times and temperatures could lead to 'equivalent' treatments, which would present the alloy as having similar grain morphology and mechanical properties under different annealing processes [20].…”

Section: Introductionmentioning

confidence: 99%

Equivalent Heat Treatments and Mechanical Properties in Cold-Rolled TiNiFe Shape-Memory Alloys

Liu,

Hui,

et al. 2023

Materials

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Heat treatments after cold rolling for TiNiFe shape-memory alloys have been compared. After EBSD analysis and as calculated by the Avrami model and Arrhenius equation, the relationship between the heat-treatment temperature and manufacturing time of TiNiFe alloys is established. Through calculation, it can be found that TiNiFe alloys can obtain similar microstructures under the annealing processes of 823 K for 776 min, 827 K for 37 min, and 923 K for 12.5 min. And the recrystallization fractions are all around 50%. Nevertheless, the tensile properties and recovery stress of the alloys show almost similar values. And based on the feasibility of the annealing process, it is believed that annealing at 873 K for 37 min is the optimal choice to obtain a recrystallization fraction φR = 50%.

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Equivalent thermo-mechanical treatments in an equiatomic Ti–Ni shape memory alloy

Cited by 13 publications

References 6 publications

The Enhanced Shape Memory Effect and Mechanical Properties in Thermomechanically Processed Semi‐Equiatomic NiTi Shape Memory Alloy

The Enhanced Shape Memory Effect and Mechanical Properties in Thermomechanically Processed Semi‐Equiatomic NiTi Shape Memory Alloy

Characterization of a Shape-Memory Alloy Using Acoustic Techniques and Modelling of the Acoustic Signature $V(z)$

Equivalent Heat Treatments and Mechanical Properties in Cold-Rolled TiNiFe Shape-Memory Alloys

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