Fabrication of Porous NiTi Shape Memory Alloy Objects by Powder Metallurgy for Biomedical Applications

Dawood, Nawal Mohammed; Ali, Abdul-Raheem Kadhum Abid; Atiyah, Alaa Abdulhasan

doi:10.1088/1757-899x/518/3/032056

Cited by 12 publications

(6 citation statements)

References 8 publications

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“…SMAs are used in various elds because of the unique properties they possess [6][7][8]. Literature review shows some gaps over which work is done here.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Study of Optimum Laser Fluence for Actuation of Shape Memory Alloy Sheet for MEMS Applications

Suraj¹,

Kumar²

2023

Preprint

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Thin sheet shape-memory alloys (SMAs) have garnered considerable attention and acclaim for their exceptional potential as top-performing materials within the realm of Micro Electro Mechanical System (MEMS) applications. Sensor/ Actuators play a crucial role in operation of all MEMS offering a multitude of functionalities. In this paper laser resistance actuation of SMA- sheet is done by focused spot laser and optimum laser fluence is obtained to avoid ablation at different power input. Effect of ablation on element composition of SMA-sheet is done with the help of Scanning Electron Microscope (SEM images) and Energy-dispersive X-ray spectroscopy (EDS).

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“…SMAs are used in various elds because of the unique properties they possess [6][7][8]. Literature review shows some gaps over which work is done here.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Study of Optimum Laser Fluence for Actuation of Shape Memory Alloy Sheet for MEMS Applications

Suraj¹,

Kumar²

2023

Preprint

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“…The sintering of all samples have been satisfied and successfully occurred with low porosity .No distortions occur in the samples shape and no fusion in any elements occur this is due to the higher purity of the powders used and accurate thermal cycle [19]. After sintering, all samples are solution treated by heating the samples up to 900 ℃ for 60 min followed by rapid quenching in ice water at ( 3 ~ 6) ℃ in order to get β΄ brim and to avoid decomposition of β phase into equilibrium phases including (α + γ2) which is have eutectoid reaction taken at 565 ℃ [ 20 ].…”

Section: The Samples Have Been Left To Slow Cooling In Furnacementioning

confidence: 75%

Influence of Titanium Additions on the Corrosion Behavior of Cu-Al-Ni Shape Memory Alloys

Dawood

AbidAli

2021

MSF

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The Cu- Al-Ni shape memory alloys have numerous industrial applications such as actuators, Cryofit hydraulic couplings, fire safety valves ,etc. while the parts that soaked in the sea water suffer severe corrosion that lead to worsening in the properties of the alloys. In the current research, the effect of adding titanium on corrosion behavior of the shape memory alloys (Cu-13wt. %Al-4wt. %Ni) were studied. Titanium was added in different weight ratios (0.4, 0.8, and 1.2 wt.%) to the base alloy. The alloys were prepared using powder metallurgy, whereby the alloys were sintered with two stages of heating under Argon atmosphere, at 550°C for (120 min.) and 950°C for (180 min.)respectively. All the sintered samples are solution treated by heating the samples at 900 °C for (60 min.) followed by rapid quenching in ice water at ( 3 ~ 6) °C. After that aging heat treatment has been done for quenched samples at 200 °C for (30 hrs.) followed by rapid quenching in iced water. Several tests such as microstructures observation and phase analysis using scanning electron microscope, energy dispersive spectrometer, and X-ray diffraction analysis have been done. Further , Corrosion behavior for all samples in aged conditions in 3.5%NaCl solution have been performed. Corrosion test results have showed that the highest corrosion resistance was found in the addition of (1.2 wt.% Ti) which give the lowest corrosion rate (0.003 mpy) in 3.5% NaCl solution . Noted that the corrosion rate of base alloy was (9.021)mpy. EDS analysis showed chemical composition of the aged surface and also mapping images for the distribution of Cu, Al, Ni, and Ti elements on the surface. Phases formed on aged samples conditions are α-Cu and AlCu3.

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“…Here are the essential phases in the powder metallurgy processing of shape memory alloys, as indicated in (figure 6). Producing the powder with the desired shape memory alloy composition is the first stage [31,67,68]. To fulfill the precise needs of the finished product, the powder size and shape can be regulated.…”

Section: Powder Metallurgy Processingmentioning

confidence: 99%

Processing of shape memory alloys research, applications and opportunities: a review

Mehta,

Singh,

Vasudev

2024

Phys. Scr.

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Shape Memory Alloys (SMAs) are metallic materials with unique thermomechanical characteristics that can regain their original shape after deformation. SMAs can be used in various industries such as consumer electronics, automobile parts, aircraft components, and biomedical devices. In this paper, we review the current state of the art of SMA fabrication and their application in the aerospace, healthcare, and aerospace industries. Specifically, we focus on the influence of manganese (Mn) addition on Cu-Al-Ni shape memory alloys' structure, mechanical characteristics, and corrosion behavior, focusing on the incorporation of small and medium-sized enterprises (SMEs) in the analysis of cu-aluminum alloys. This study explores the integration of SME and superelasticity, critical phenomena in SMA behavior, and can be utilized to develop and evaluate SMA-based devices and structures, as well as to understand the mechanism behind SMA actuation and develop improved materials. FEM simulations are crucial for optimizing designs and enhancing performance in sectors like aerospace and healthcare. FEM simulations can also be used to predict the stress and strain of SMA-based devices and structures. This can help to reduce cost, improve efficiency, and reduce the risk of failure. Additionally, FEM simulations can help to identify potential weaknesses in SMA-based designs and suggest modifications or improvements.

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Fabrication of Porous NiTi Shape Memory Alloy Objects by Powder Metallurgy for Biomedical Applications

Cited by 12 publications

References 8 publications

RETRACTED: Study of Optimum Laser Fluence for Actuation of Shape Memory Alloy Sheet for MEMS Applications

RETRACTED: Study of Optimum Laser Fluence for Actuation of Shape Memory Alloy Sheet for MEMS Applications

Influence of Titanium Additions on the Corrosion Behavior of Cu-Al-Ni Shape Memory Alloys

Processing of shape memory alloys research, applications and opportunities: a review

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