Development of Ni-Ti Shape Memory Alloys through Novel Powder Metallurgy Route and Effect of Rolling on their properties

Purohit, Rajesh; Patel, Krishan Kumar; Gupta, Gaurav; Rana, R.S.

doi:10.1016/j.matpr.2017.05.043

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Moreover, the microhardness of the studied Zr-containing HEAs was compared with our Hf-and Mo-containing bio-HEAs with similar chemical composition, conventional biomaterials, and human bone (Table 6). NiTi (hot-pressed and rolled) 693 [46] 316L SS (laser-cladded) 467.8 [47] Ti-6Al-4V (selective laser-melted) 390 [48] Ti-40Nb-10Ag (sintered at 975 • C) 360.4 [49] Titanium Grade 4 (after SPD process) 330 [50] cp-Ti (after high-pressure torsion) 305 [51] 316L SS (additive-manufactured) 300 [52] Lamellar bone 88.8 [53] According to the presented results, the microhardness of all the studied Zr-containing HEAs was comparable with the literature reporting Hf-and Mo-containing HEAs [27,28]. Nevertheless, the microhardness was higher in comparison to Ti-based biomaterials and human bone.…”

Section: Microhardness Of Investigated Heasmentioning

confidence: 99%

Influence of Zirconium on the Microstructure, Selected Mechanical Properties, and Corrosion Resistance of Ti20Ta20Nb20(HfMo)20−xZrx High-Entropy Alloys

Glowka,

Zubko,

Świec

et al. 2024

Materials

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The presented work considers the influence of the hafnium and molybdenum to zirconium ratio of Ti20Ta20Nb20(HfMo)20−xZrx (where x = 0, 5, 10, 15, 20 at.%) high-entropy alloys in an as-cast state for potential biomedical applications. The current research continues with our previous results of hafnium’s and molybdenum’s influence on a similar chemical composition. In the presented study, the microstructure, selected mechanical properties, and corrosion resistance were investigated. The phase formation thermodynamical calculations were also applied to predict solid solution formation after solidification. The calculations predicted the presence of multi-phase, body-centred cubic phases, confirmed using X-ray diffraction and scanning electron microscopy. The chemical composition analysis showed the segregation of alloying elements. Microhardness measurements revealed a decrease in microhardness with increased zirconium content in the studied alloys. The corrosion resistance was determined in Ringer’s solution to be higher than that of commercially applied biomaterials. The comparison of the obtained results with previously reported data is also presented and discussed in the presented study.

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Section: Microhardness Of Investigated Heasmentioning

confidence: 99%

Influence of Zirconium on the Microstructure, Selected Mechanical Properties, and Corrosion Resistance of Ti20Ta20Nb20(HfMo)20−xZrx High-Entropy Alloys

Glowka,

Zubko,

Świec

et al. 2024

Materials

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“…Its shape memory effect (SME) and superelasticity make it suitable for various applications, including in the automotive sector. NiTi shape memory alloys are available on the market in different forms including cold-rolled strips and tubes [4][5][6], wires [7,8], sheets or plates [9,10], foils [11,12], and springs [10,13,14]. In different complicated actuators that use composite materials, shape memory alloy wires are embedded in the composite to improve their working ability, such as fast response in shape-changing of the structure, mechanical behaviour, and impactful actuation [15,16].…”

Section: Introductionmentioning

confidence: 99%

Design and Control of a Shape Memory Alloy-Based Idle Air Control Actuator for a Mid-Size Passenger Vehicle Application

Turabimana,

Sohn,

Choi

2024

Applied Sciences

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The idle air control actuator is an important device in automotive engine management systems to reduce fuel consumption by controlling the engine’s idling operation. This research proposes an innovative idle air control (IAC) actuator for vehicle applications utilizing shape memory alloy (SMA) technology. The proposed actuator leverages the unique properties of SMAs, such as the ability to undergo large deformations upon thermal activation, to achieve precise and rapid controls in the air intake of automotive engines during idle conditions. The actuator structure mechanism consists of an SMA spring and an antagonistic spring made from steel. The design process utilizes both numerical and analytical approaches. The SMA spring is electrically supplied to activate the opening process of the actuator, and its closing state does not need electricity. However, the PID controller is used to control the applied current, which reduces the time taken by the actuator to achieve the actuation strokes. It shows good operability within multiple numbers of operation cycles. Additionally, the performance of the designed actuator is evaluated through mathematical algorithms by integrating it into the engine’s air intake system during idle operating conditions. The results demonstrate the effectiveness of the SMA-based actuator in achieving rapid control of the air intake through bypass, thereby improving engine idle conditions.

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Enhancement of Physical and Mechanical Characteristics of NiTi Composite Containing Ag and TiC

Sharma¹,

Singh²,

Tiwari

et al. 2021

J. of Materi Eng and Perform

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Development of Ni-Ti Shape Memory Alloys through Novel Powder Metallurgy Route and Effect of Rolling on their properties

Cited by 6 publications

References 5 publications

Influence of Zirconium on the Microstructure, Selected Mechanical Properties, and Corrosion Resistance of Ti20Ta20Nb20(HfMo)20−xZrx High-Entropy Alloys

Influence of Zirconium on the Microstructure, Selected Mechanical Properties, and Corrosion Resistance of Ti20Ta20Nb20(HfMo)20−xZrx High-Entropy Alloys

Design and Control of a Shape Memory Alloy-Based Idle Air Control Actuator for a Mid-Size Passenger Vehicle Application

Enhancement of Physical and Mechanical Characteristics of NiTi Composite Containing Ag and TiC

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