An experimental investigation on performance of NiTi-based shape memory alloy 4D printed actuators for bending application

Sreesha, Rakshith B.; Ladakhan, Saiyadali H.; Mudakavi, Deepak; Adinarayanappa, Somashekara M

doi:10.1007/s00170-022-09875-w

Cited by 12 publications

(5 citation statements)

References 43 publications

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“…Nitinol (Ni-Ti) is a well-known shape memory alloy that consists of nickel and titanium. It is widely used in various applications due to its excellent shape memory and superelasticity properties [149][150][151]. Copper-based shape memory alloys, like Cu-Al-Mg and Cu-Zn-Al, can be utilized for 4D printing applications, offering good shape memory behavior and mechanical properties [152,153].…”

Section: Shape Change Manipulation Using Laser Processingmentioning

confidence: 99%

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Murzin,

Stiglbrunner

2023

Applied Sciences

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Laser processing is a versatile tool that enhances smart materials for diverse industries, allowing precise changes in material properties and customization of surface characteristics. It drives the development of smart materials with adaptive properties through laser modification, utilizing photothermal reactions and functional additives for meticulous control. These laser-processed smart materials form the foundation of 4D printing that enables dynamic shape changes depending on external influences, with significant potential in the aerospace, robotics, health care, electronics, and automotive sectors, thus fostering innovation. Laser processing also advances photonics and optoelectronics, facilitating precise control over optical properties and promoting responsive device development for various applications. The application of computer-generated diffractive optical elements (DOEs) enhances laser precision, allowing for predetermined temperature distribution and showcasing substantial promise in enhancing smart material properties. This comprehensive overview explores the applications of laser technology and nanotechnology involving DOEs, underscoring their transformative potential in the realms of photonics and optoelectronics. The growing potential for further research and practical applications in this field suggests promising prospects in the near future.

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Section: Shape Change Manipulation Using Laser Processingmentioning

confidence: 99%

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Murzin,

Stiglbrunner

2023

Applied Sciences

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“…In recent years, many efforts on the printability of NiTi through SLM have been made. There are several interesting papers on the printability of NiTi, such as [36][37][38]. By now, the production of complex NiTi components is mainly limited to small parts.…”

Section: Introductionmentioning

confidence: 99%

Damping property of a NiTi auxetic structure fabricated through selective laser melting

Nespoli

Grande²,

Passaretti³

et al. 2023

Int J Adv Manuf Technol

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The present work aims at studying the damping response of a NiTi auxetic structure fabricated through additive manufacturing. Furthermore, an electropolishing route has been accounted for improving the roughness on the external surface of the printed samples. The damping capacity of the manufactured auxetic NiTi components is evaluated through the amount of energy dissipated per cycle and through the loss factor index. Results show that the damping capacity of the auxetic NiTi cell takes advantage of electropolishing and it is superior to that of traditional materials. Particularly, a maximum dissipated energy of 55 mJ was registered in the austenite state after 10 min of electropolishing; additionally, the loss factor shows a maximum of 0.0523 in the R-phase.

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“…The choice of stent material has a crucial impact on the performance of stent and the clinical access. Among the metal cardiovascular stent materials, NiTi alloy is widely utilized owing to its exclusive properties and behaviors, including superelastic behavior, shape memory effect and superior biocompatibility [2][3][4]. The conventional manufacturing method of producing NiTi cardiovascular stents, like laser cutting [5], braiding [6] and knitting [7] demands tedious steps and the stent dimensions highly depend on the size of available tubes.…”

Section: Introductionmentioning

confidence: 99%

Surface characteristics of NiTi cardiovascular stents by selective laser melting

Zhang,

Li,

et al. 2023

Preprint

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Selective laser melting (SLM) has gained great attention to manufacture cardiovascular stents given its potential of fabricating customized stents with complex shapes to satisfy clinical requirements. In this study, the surface characteristics of NiTi cardiovascular stents by SLM were explored. The effect of SLM machining parameters on surface morphology, geometry accuracy, phase composition, surface roughness and contact angle were analyzed. The results demonstrated that the surface morphology of stent became more irregular and the surface roughness was enhanced accompanied by the volume energy density (VED) increased. SLMed stents exhibited hydrophobic properties, and the rougher surface obtained a lower contact angle. The deviation of strut thickness was more than 200% than the nominal value under 194 J/mm3. The lowest VED displayed strong cubic B2 structure with less content loss of Ni, satisfying the self-expand NiTi stent requirements. Then electrochemical polishing (ECP) process distinctly improved the surface quality, providing smoother surfaces. The surface roughness reduced minimum to 0.45 µm from 6.64 µm for SLMed stent, and the average strut thickness was reduced to 230 µm at most. Finally, electrochemical test results revealed that SLM-ECPed stents showed a more obvious tendency to resist corrosion compared to SLMed stents.

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An experimental investigation on performance of NiTi-based shape memory alloy 4D printed actuators for bending application

Cited by 12 publications

References 43 publications

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Damping property of a NiTi auxetic structure fabricated through selective laser melting

Surface characteristics of NiTi cardiovascular stents by selective laser melting

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