Effects of Ni Content and Solution-Aging Treatment on Multi-Stage Transformations of TiNi Shape Memory Alloys

Wang, Qi; Zhang, He; Liu, Manqian; Yang, Jun; Liu, Yan

doi:10.1016/s1875-5372(11)60022-2

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…1(f)). The fine in-suit TiB 2 particles are easily agglomerated into large particle clusters, driven by the large excess surface free energy in the fine particles [6]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The average grain sizes of composites decrease with the addition of TiB 2 particle. On one hand, it is because some of TiB 2 particle can act as heterogeneous nucleating agents [6], and on the other hand, the TiB 2 particles on the grain boundary can hinder the diffusion of Mg and block the solidification front growth. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Titanium diboride (TiB 2 ) ceramic particulate possesses many desirable properties, such as high hardness, low density, high melting temperature, high modulus and high corrosion resistance [6][7][8][9]. In the previous studies, TiB 2 particle can obviously refine the microstructures of magnesium alloy, and improve their mechanical properties [6,10]. These outstanding features portray it to be a good potential reinforcing candidate in magnesium matrixes, especially the Mg-Sn alloy.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Mechanical Properties of Mg-Based Composites Reinforced with TiB<sub>2</sub> Particles

Fang

Liu

Meng

et al. 2014

AMR

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The effects of in-situ TiB2 particle fabricated from Al-Ti-B system via the self-propagating high-temperature synthesis (SHS) reaction technology on microstructure and mechanical properties of Mg-Sn-Zn-Al alloy were investigated. The results indicate that the size of the Mg2Sn and α-Mg+Mg32(Al,Zn)49 phase becomes coarser with the increasing content of Al-Ti-B preform, meanwhile the amount of eutectic α-Mg+Mg32(Al,Zn)49 phase increases too. The addition of Al-Ti-B is favorable toward promoting the strength of composites, but deteriorates elongation. The resulting as-extruded composite material with 4 wt.% Al-Ti-B preform exhibits good overall mechanical properties with an ultimate tensile strength of 291 MPa and an elongation over 2 %.

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“…1(f)). The fine in-suit TiB 2 particles are easily agglomerated into large particle clusters, driven by the large excess surface free energy in the fine particles [6]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and Mechanical Properties of Mg-Based Composites Reinforced with TiB<sub>2</sub> Particles

Fang

Liu

Meng

et al. 2014

AMR

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“…According to Figure S4a, the EDS results of the wire surfaces show that the original NiTi wire possesses a certain oxide layer, and after heating treatment, the oxidation level on the NiTi wire surface increases slightly compared with that of the as-received sample, but the nickel ion concentration is distinctly decreased. This indicates that an oxide layer on the surface of NiTi wire plays the role of a natural barrier, which can weaken the release of nickel and reduce the allergic or toxic reactions in the human body, to a certain extent. , When the heating time exceeds 50 min even up to 90 min, the oxygen content of the NiTi sample remains relatively stable, indicating that the surface oxidation process is difficult to continue at this temperature. Because NiTi wire is the longest component in a composite metal guide wire, the results of NiTi wire are considered as the selection standard for heating treatment, and 180 °C50 min is selected as the heating treatment parameters of other bare metal wires.…”

Section: Resultsmentioning

confidence: 99%

Superhydrophilic and Antifriction Thin Hydrogel Formed under Mild Conditions for Medical Bare Metal Guide Wires

Yang,

Lin,

Shah

et al. 2023

ACS Appl. Mater. Interfaces

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Medical guide wires play a crucial role in the process of intravascular interventional therapy. However, it is essential for bare metal guide wires to possess both hydrophilic lubricity and coating durability, avoiding tissue damage caused by friction inside the blood vessel during the interventional procedure. Additionally, it is still a huge challenge for diverse metal materials to bind with polymer coatings easily. Herein, we present a hydrogel coating scheme and its preparation method for various wires under mild conditions for environmental protection purposes. The preparation process involves surface pretreatment, including lowtemperature heating and silanization, followed by a two-step dip coating and ultraviolet polymerization. The whole process leads to the formation of an interpenetrating cross-linked hydrogel network from the substrate to the surface section. This study confirms the superhydrophilicity and lubricity of three metal wires with the designed coating, especially reducing the friction significantly by ≥ 95%. The thin coating (average thickness <6.2 μm) demonstrates strong adhesion with various substrates and exhibits resistance to 25 or even 125 cycles of friction, indicating excellent stability and preventing easy detachment. The finally prepared composite nickel−titanium (NiTi) guide wire with stainless steel (SS) and platinum−tungsten (Pt−W) coils (overall diameter of ∼0.36 mm) shows satisfactory performance with a friction of 0.183 N for 25 cycles, meeting the clinical requirements (average friction ≤0.2 N) for interventional operation. These findings highlight the potential of this study in advancing the development of medical devices, particularly in the field of intravascular interventional therapy.

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Transformation behavior and shape memory effect of Ti50−x Ni48Fe2Nb x alloys by aging treatment

Liu

2012

Rare Metals

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Effects of Ni Content and Solution-Aging Treatment on Multi-Stage Transformations of TiNi Shape Memory Alloys

Cited by 7 publications

References 9 publications

Microstructure and Mechanical Properties of Mg-Based Composites Reinforced with TiB<sub>2</sub> Particles

Microstructure and Mechanical Properties of Mg-Based Composites Reinforced with TiB<sub>2</sub> Particles

Superhydrophilic and Antifriction Thin Hydrogel Formed under Mild Conditions for Medical Bare Metal Guide Wires

Transformation behavior and shape memory effect of Ti50−x Ni48Fe2Nb x alloys by aging treatment

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