Torsional behavior and microstructure characterization of additively manufactured NiTi shape memory alloy tubes

Safaei, Keyvan; Nematollahi, Mohammadreza; Bayati, Parisa; Dabbaghi, Hediyeh; Benafan, Othmane; Elahinia, Mohammad

doi:10.1016/j.engstruct.2020.111383

Cited by 40 publications

(18 citation statements)

References 63 publications

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“…Recently, and motivated by the growing interest in SMA torque tubes, we studied the torsional behavior of NiTi tubes. 87 We showed that surface defects and oxides have detrimental impacts on the thermomechanical performance of the tubes.…”

Section: Thermomechanical Behavior Of Lpbf Niti Alloymentioning

confidence: 85%

“…In the presence of sufficient oxygen and reaction time, Ti 4 Ni 2 O x is derived from the reaction between Ti 2 Ni and oxygen. 87 Ni 3 Ti and Ni 4 Ti 3 phases compose the main Nirich precipitates that can form during aging heat treatments or manufacturing processes. 88 For the LPBF process, the repeated passage of the laser and corresponding reheating processes provide a semiaging effect in which the part is held at temperatures between 200°C to 700°C for a while, being suitable for the formation of the metastable phase of Ni 4 Ti 3 precipitates.…”

Section: Microstructure Of Niti Alloy Processed By Lpbf: Grain Morphology Texture and Precipitationmentioning

confidence: 99%

“…It is thus essential to keep the oxygen level in the chamber as low as possible to reduce the chance of oxidation. 87 Most literature studies have focused on the uniaxial compression/ tension behavior of LPBF NiTi parts, while the torsional behavior of NiTi-based alloys is becoming of interest due to the application of torque tubes. Recently, and motivated by the growing interest in SMA torque tubes, we studied the torsional behavior of NiTi tubes.…”

Section: Thermomechanical Behavior Of Lpbf Niti Alloymentioning

confidence: 99%

See 2 more Smart Citations

Additive Manufacturing of NiTi Shape Memory Alloy for Biomedical Applications: Review of the LPBF Process Ecosystem

Safaei

Abedi

Nematollahi

et al. 2021

JOM

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NiTi shape memory alloys (SMAs) are used in a broad range of biomedical applications because of their unique properties including biocompatibility and high corrosion and wear resistance as well as functional properties such as superelasticity and the shape memory effect. The combination of SMAs and additive manufacturing can lead to revolutionary changes to the uses of SMAs in the biomedical industry. This article discusses the potential biomedical applications of NiTi that benefit from the AM process. We share the lessons learned in processing NiTi alloys with a focus on the laser powder bed fusion (LPBF) technique. The manufacturability, build quality, stable phases and transformation temperatures, microstructure, thermomechanical properties, microstructure tailoring, and functional properties of NiTi alloys produced via AM processing are reviewed. Current challenges such as expanding the process window, controlling the chemistry, and the performance and property responses are discussed, and potential opportunities including alloy design are discussed.

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Section: Thermomechanical Behavior Of Lpbf Niti Alloymentioning

confidence: 85%

Section: Microstructure Of Niti Alloy Processed By Lpbf: Grain Morphology Texture and Precipitationmentioning

confidence: 99%

Section: Thermomechanical Behavior Of Lpbf Niti Alloymentioning

confidence: 99%

See 1 more Smart Citation

Additive Manufacturing of NiTi Shape Memory Alloy for Biomedical Applications: Review of the LPBF Process Ecosystem

Safaei

Abedi

Nematollahi

et al. 2021

JOM

Self Cite

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“…Reliable testing models are essential for the assessment of SMA characteristics and there have been many efforts made toward the same. 198–203 The impacts of AM processes on the SMA characteristics and properties are also being explored in depth. 204–207 The fatigue modeling of SMAs fabricated through AM is another topic of interest with many recent and ongoing studies.…”

Section: Discussionmentioning

confidence: 99%

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Nair

Radhika

2022

Proc Inst Mech Eng H

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The significance of advanced smart materials in recent technological research and advancement is apparent from its extensive use in present day devices and instruments. Of the various smart materials in use today, the fascinating category of shape memory alloys (SMAs) is equipped with the ability to return to a previously memorized shape under certain thermomechanical or magnetic stimuli. The unique property of shape memory effect and superelasticity displayed by these materials along with good biocompatibility and corrosion resistance make them ideal for biomedical applications. The various applications of SMAs in surgical instruments, surgical implants, and assistive and rehabilitative devices have significant effect on the day to day life of people in the present age. Majority of these biomedical devices belong to the orthodontic, orthopedic, or surgical fields. Other remarkable applications of SMAs such as in the production of prostheses and orthoses designed through the biomimetic approach are also highly influential in improving the quality of life. The present paper provides an overview of the various properties of shape memory alloys and their applications in the biomedical field over the years, that have had a significant impact on the realm of medical science.

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“…Rod [147,204,310] Cylindrical bar [180,220,296,310] Cable [93,94,106,119] Tube [38,49,64,65,70,121,123,194,195,207,271,294,302] Film/foil […”

Section: Conclusion and Suggestions For Future Workmentioning

confidence: 99%

Applying Full-Field Measurement Techniques for the Thermomechanical Characterization of Shape Memory Alloys: A Review and Classification

Delpueyo

Jury

Balandraud

et al. 2021

Shap. Mem. Superelasticity

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Full-field measurement techniques are now mature. As such, they have profoundly impacted the experimental mechanics community in recent years. The way that shape memory alloys (SMAs) are now tested is not spare from this deep-rooted trend, as reflected by the increasing number of papers published in the SMA literature. In this context, the aim of this contribution is to give an overview of the use of full-field measuring techniques for SMA characterization purposes. We recall first the basic principle of one volume and four surface techniques employed in this community. Several typical papers where such techniques are employed are then presented, by highlighting in each case the extent to which the thermomechanical response of SMAs could be better understood and modeled thanks to these techniques. A classification by several criteria of about 300 references is finally offered and discussed. The main criteria are the type of SMA, the type of technique employed to perform the measurements, and the type of test.

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Torsional behavior and microstructure characterization of additively manufactured NiTi shape memory alloy tubes

Cited by 40 publications

References 63 publications

Additive Manufacturing of NiTi Shape Memory Alloy for Biomedical Applications: Review of the LPBF Process Ecosystem

Additive Manufacturing of NiTi Shape Memory Alloy for Biomedical Applications: Review of the LPBF Process Ecosystem

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Applying Full-Field Measurement Techniques for the Thermomechanical Characterization of Shape Memory Alloys: A Review and Classification

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