Cyclic deformation properties of TiNi shape memory alloy under thermomechanical loading

1996 ◽  
Author(s):  
Hisaaki Tobushi ◽  
Shinya Yamada ◽  
Takashi Hachisuka ◽  
Kikuaki Tanaka
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Cyclic Deformation ◽  
Thermomechanical Loading ◽  
Deformation Properties

Effect of Cu Addition on Cyclic Deformation Properties of Ti-Ni Shape Memory Alloy Fabricated by Spark-Plasma Sintering Method

2002 ◽  
Vol 2002.2 (0) ◽  
pp. 511-512
Author(s):  
Takeshi Kadomura ◽  
Masakazu Yokota ◽  
Hideki Kyogoku ◽  
Shinichiro Komatsu ◽  
Fusahito Yoshida ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Spark Plasma Sintering ◽  
Cyclic Deformation ◽  
Plasma Sintering ◽  
Deformation Properties ◽  
Spark Plasma ◽  
Sintering Method

Cyclic Deformation and Fatigue of a TiNi Shape-Memory Alloy Wire Subjected to Rotating-Bending

1997 ◽  
Author(s):  
H. Tobushi ◽  
T. Hachisuka ◽  
T. Hashimoto ◽  
S. Yamada
Keyword(s):  
Fatigue Life ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Rotational Speed ◽  
Cyclic Deformation ◽  
Rhombohedral Phase ◽  
Shape Memory Alloy Wire ◽  
Alloy Wire ◽  
Deformation Properties ◽  
Rotating Bending

Abstract The cyclic deformation and fatigue of a TiNi shape-memory alloy wire was studied by carrying out rotating-bending fatigue tests at various strain amplitudes, temperatures and rotational speeds in air and in water. The results were summarized as follows: (1) for strain amplitudes in the rhombohedral-phase transformation region, the fatigue life was longer than 107 cycles and the deformation properties did not change under cyclic deformation; (2) for the strain amplitudes in the martensitic transformation region, the fatigue life was shorter than 105 cycles and the higher the temperature, the shorter was the fatigue life; (3) the rotational speed did not affect the fatigue life in water but a higher rotational speed led to a shorter fatigue life in air.

Compression and Compression-Compression Cyclic Deformation Properties of Ferromagnetic Ni2MnGa-Based Shape Memory Alloy

2003 ◽  
Vol 426-432 ◽  
pp. 2207-2212 ◽  
Author(s):  
Takashi Kira ◽  
Kinzo Murata ◽  
Tamotsu Shimada ◽  
Soon Jong Jeong ◽  
Shozo Inoue ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Cyclic Deformation ◽  
Deformation Properties

Cyclic Deformation and Fatigue of a TiNi Shape-Memory Alloy Wire Subjected to Rotating Bending

1998 ◽  
Vol 120 (1) ◽  
pp. 64-70 ◽  
Author(s):  
H. Tobushi ◽  
T. Hachisuka ◽  
T. Hashimoto ◽  
S. Yamada
Keyword(s):  
Fatigue Life ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Rotational Speed ◽  
Cyclic Deformation ◽  
Rhombohedral Phase ◽  
Shape Memory Alloy Wire ◽  
Alloy Wire ◽  
Deformation Properties ◽  
Rotating Bending

The cyclic deformation and fatigue of a TiNi shape-memory alloy wire were studied by carrying out rotating-bending fatigue tests at various strain amplitudes, temperatures, and rotational speeds in air and in water. The results were summarized as follows: (1) for strain amplitudes in the rhombohedral-phase transformation region, the fatigue life was longer than 107 cycles and the deformation properties did not change under cyclic deformation; (2) for the strain amplitudes in the martensitic transformation region, the fatigue life was shorter than 105 cycles and the higher the temperature, the shorter was the fatigue life; (3) the rotational speed did not affect the fatigue life in water but a higher rotational speed led to a shorter fatigue life in air.

A constitutive model for Fe-based shape memory alloy considering martensitic transformation and plastic sliding coupling: Application to a finite element structural analysis

2012 ◽  
Vol 23 (10) ◽  
pp. 1143-1160 ◽  
Author(s):  
Walid Khalil ◽  
Alain Mikolajczak ◽  
Céline Bouby ◽  
Tarak Ben Zineb
Keyword(s):  
Finite Element ◽  
Phase Transformation ◽  
Structural Analysis ◽  
Shape Memory Alloy ◽  
Constitutive Model ◽  
Shape Memory ◽  
Internal Variables ◽  
Thermomechanical Loading ◽  
Proposed Model ◽  
Numerical Tool

In this article, we propose a finite element numerical tool adapted to a Fe-based shape memory alloy structural analysis, based on a developed constitutive model that describes the effect of phase transformation, plastic sliding, and their interactions on the thermomechanical behavior. This model was derived from an assumed expression of the Gibbs free energy taking into account nonlinear interaction quantities related to inter- and intragranular incompatibilities as well as mechanical and chemical quantities. Two scalar internal variables were considered to describe the phase transformation and plastic sliding effects. The hysteretic and specific behavior patterns of Fe-based shape memory alloy during reverse transformation were studied by assuming a dissipation expression. The proposed model effectively describes the complex thermomechanical loading paths. The numerical tool derived from the implicit resolution of the nonlinear partial derivative constitutive equations was implemented into the Abaqus® finite element code via the User MATerial (UMAT) subroutine. After tests to verify the model for homogeneous and heterogeneous thermomechanical loadings, an example of Fe-based shape memory alloy application was studied, which corresponds to a tightening system made up of fishplates for crane rails. The results we obtained were compared to experimental ones.

311 Deformation Properties of TiNi Shape Memory Alloy

2000 ◽  
Vol 2000.49 (0) ◽  
pp. 153-154
Author(s):  
Kazuyuki TAKATA ◽  
Hisaaki TOBUSHI ◽  
Kayo OKUMURA
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Deformation Properties
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