Crystal plasticity finite element simulation of NiTi shape memory alloy under canning compression based on constitutive model containing dislocation density

Yan, Bingyao; Jiang, Shengyao; Hu, Li; Zhang, Yanqiu; Sun, Dong

doi:10.1016/j.mechmat.2021.103830

Cited by 21 publications

(1 citation statement)

References 76 publications

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“…36,37 In addition, pseudoelastic NiTi, 39 the most common shape memory alloy, can be implanted in the body in a compressed manner because it can withstand mechanical deformations of as much as 8% and return to its original shape without plastic deformation. 40 In this way, the shape memory alloy can create and maintain a certain level of mechanical stress, which is its main task. A high damping rate (0.038 ± 0.004 in austenite; 0.002 ± 0.004 in martensite) 41 is important for balancing the stress transfer at the bone−implant interface.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Korkmaz

Sağlam

2022

ACS Biomater. Sci. Eng.

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Design and material research continues to increase dental implants’ success rates, which is a widely applied treatment type. The size and morphology of the implant–bone interface are essential for implant stability. Our study produced a dental implant with two artificial tooth roots from NiTi alloy to increase the implant–bone contact surface. The properties of NiTi alloy, such as transformation temperature and composition, were determined by material characterization tests. Using NiTi alloy’s shape memory effect, these artificial roots at body temperature were programmed with appropriate heat treatments for the self-fitting feature. Dental-implant-like models are coated with TiN to prevent Ni ion release. The corrosion tests were performed in Ringer’s solution to determine the effect of TiN coating on Ni ion release. The nickel ion emission values showed that the TiN coating inhibited the release. In addition, it was determined that the TiN coating increased the shape memory transformation time of the NiTi alloy. In in vitro tests of NiTi and TiN-coated NiTi implants, it was observed that they completed self-fitting by deforming the trabecular bone, but the placement in the cortical bone was not complete. During the use of a shape memory implant, it should complete its transformation without contacting the cortical bone and should not cause a stress concentration.

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Section: Introductionmentioning

confidence: 99%

Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Korkmaz

Sağlam

2022

ACS Biomater. Sci. Eng.

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Research on the Heterogeneous Deformation Behavior of Nickel Base Alloy Based on CPFEM

Liu,

You,

Zhao

et al. 2024

Cryst. Res. Technol.

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In this paper, a crystal plasticity finite element method (CPFEM), considering the grain morphology and orientation, as well as the dislocation density, is used to research the tensile deformation behavior of GH4169 based on Electron Backscatter Diffraction (EBSD). The stress, plastic strain, and dislocation density distributions are obtained for different levels of deformation. Results show that the stress, plastic strain, and dislocation density exhibit obvious heterogeneous plastic deformation, and stress concentration and dislocation pileup mainly occurs near grain boundaries. The initial dislocation density mainly affects the stress–strain curve of the material, and it can obviously effect the yield strength but cannot influence the hardening ability of the material. The total dislocation density increases with plastic strain. However, the texture evolution has no evident change with increasing plastic strain, except for the increase of texture content in Cube (001)[100].

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Mechanical Properties of Fine-Grained Low Alloy Steel Investigated by Crystal Plasticity Finite Element Method

Feng,

Yang,

Zhang

et al. 2023

J. of Materi Eng and Perform

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Crystal plasticity finite element simulation of NiTi shape memory alloy under canning compression based on constitutive model containing dislocation density

Cited by 21 publications

References 76 publications

Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Research on the Heterogeneous Deformation Behavior of Nickel Base Alloy Based on CPFEM

Mechanical Properties of Fine-Grained Low Alloy Steel Investigated by Crystal Plasticity Finite Element Method

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