Effect of crystallographic anisotropy on phase transformation and tribological properties of Ni-rich NiTi shape memory alloy fabricated by LPBF

Shi, Guangfeng; Li, Lunxiang; Yu, Zhenglei; Sha, Pengwei; Cao, Qing; Xu, Zezhou; Liu, Yuting; Guo, Yunting; Si, Jiashun; Liu, Jia‐Bao

doi:10.1016/j.optlastec.2022.108731

Cited by 15 publications

(12 citation statements)

References 73 publications

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“…Liu et al [126] showed that high density of dislocations could promote the formation of nanocrystalline and amorphoslike phases, which was beneficial to the enhancement of SE response with a stable pseudoelasticity of 5.8%. Shi et al [127] researched the impact of different crystal orientations on superelastic response, showing that the sample with a strong (0 0 1) texture possessed the highest recoverable superelastic strain of 7.91 ± 0.14%.…”

Section: Superelasticity Responsementioning

confidence: 99%

Laser powder bed fusion additive manufacturing of NiTi shape memory alloys: a review

Wei

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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NiTi alloys have drawn significant attention in biomedical and aerospace fields due to their unique shape memory effect (SME), superelasticity (SE), damping characteristics, high corrosion resistance, and good biocompatibility. Because of the unsatisfying processabilities and manufacturing requirements of complex NiTi components, additive manufacturing technology, especially laser powder bed fusion (LPBF), is appropriate for fabricating NiTi products. This paper comprehensively summarizes recent research on the NiTi alloys fabricated by LPBF, including printability, microstructural characteristics, phase transformation behaviors, lattice structures, and applications. Process parameters and microstructural features mainly influence the printability of LPBF-processed NiTi alloys. The phase transformation behaviors between austenite and martensite phases, phase transformation temperatures, and an overview of the influencing factors are summarized in this paper. This paper provides a comprehensive review of the mechanical properties with unique strain-stress responses are also explained, which comprise tensile mechanical properties, thermomechanical properties (e.g., critical stress to induce martensite transformation, thermo-recoverable strain, and superelasticity strain), damping properties and hardness. Moreover, several common structures (e.g., a negative Poisson’s ratio structure and a diamond-like structure) are considered, and the corresponding studies are summarized. It illustrates the various fields of application, including biological scaffolds, shock absorbers, and driving devices. In the end, the paper concludes with the main achievements from the recent studies and puts forward the limitations and development tendencies in the future.

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Section: Superelasticity Responsementioning

confidence: 99%

Laser powder bed fusion additive manufacturing of NiTi shape memory alloys: a review

Wei

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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“…Jinguo Ge et al (2022) studied the micro-hardness mapping which indicated that homogenous anti-indentation properties were acquired regardless of location variations [2]. To highlight the effect of Ni, Guangfeng Shi et al (2022) studied Ni-rich NiTi alloys with different building orientations of 0•, 45• and 90• fabricated by LPBF to conclude that during the friction process, sample 90• was more favorable for the formation of tribolayers since the [111] orientation is characterized as "hard" and was attributed to a combined action of the highest nano hardness, and highest critical stress for the stress-induced martensitic transformation [3]. K. utilizes isothermal compression followed by aging to design R and B2 nano-domains, and super elastic instability for as deformed NiTi and superelastic stability for as-aged NiTi.…”

Section: Figurementioning

confidence: 99%

Mechanical Properties of NiTi Based Shape Memory Alloy used in Manufacturing of Mars Rover Wheels: Short Review

Parmar¹,

Mishra²

2022

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Shape memory alloys (SMA) are innovatively designed for engineering applications including, but not limited to, medical devices, actuators, micromechanical systems, deployable structures, and elastocaloric devices. Prior to the manufacture of any component for the above mentioned applications, an extensive simulation study is recommended as the basic properties are required to be filled in the software. The unavailability of to-the-point literature makes this task difficult for researches. In this paper, an overview of binary NiTi based shape memory alloy is given, where its characteristic physical properties i.e. shape memory effect and super elastic effect, and mechanical properties like fatigue failure, stress-strain characteristics and yield and ultimate strength is stated for several different specimens prepared using thermomechanical methods.

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“…The dimensions of the cells are 1 × 1 × 1 mm 3 , while the dimensions of the overall lattice structure are 10 × 10 × 10 mm 3 , the LPBF process uses different combinations of laser power (120, 240 and 360 W), laser scanning speed (400, 800 and 1200 mm s −1 ) and layer thickness (0.03, 0.05 and 0.1 mm). Guangfeng Shi et al [3,4] has carried out a certain research on the preparation of NiTi alloy by selective laser melting, they prepared Ni50.8 and Ti49.2 NiTi alloy powders using electrode induced melting gas atomization technology, NiTi parts were produced using a commercial SLM machine (BLT S210, China) equipped with a 500 W Ytterbium fiber laser, the powder was dried for 6 h in a vacuum oven at 100 °C prior to the SLM process, which is carried out in an argon environment to keep oxygen levels below 300 ppm. However, the roughness of NiTi alloys prepared by selective laser melting is poor.…”

Section: Introductionmentioning

confidence: 99%

Dynamical model and numerical study of cavitation bubble in ultrasonic assisted electrochemical polishing solution of selective laser melting NiTi alloy

Che,

Shi,

Zhou

2023

Phys. Scr.

Self Cite

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In the process of ultrasound assisted electrochemical polishing of selective laser melting (SLM) NiTi alloy, a large number of cavitation bubbles will be generated in the anode and cathode, and these cavitation bubbles will expand and compress rapidly until finally collapse. At the moment of collapse, high temperature and high pressure will occur, and at the same time, pressure shock wave and micro-jet will be produced, which will have a certain impact on material removal during polishing. In order to explore the mechanism of ultrasonic assisted electrochemical polishing, in this paper, the dynamics of cavitation bubbles with free interface and rigid interface are analyzed by ultrasonic assisted electrochemical polishing. The dynamics models of single cavitation bubble and two cavitation bubbles are established. The fourth order Runge–Kutta method was used to solve the model numerically, and the influence of electric field intensity, initial bubble radius, sound pressure amplitude and ultrasonic frequency on the dynamics of cavitation bubble was analyzed. The results show that in the range of f = 1–10 KHz, the initial radius of bubble is 0.01–0.05 micron, the sound pressure amplitude is 103 Pa, and the electric field intensity is 104 V m−1, the cavitation movement gradually becomes regular, and it goes through a complete process of expansion, contraction and then collapse, which is beneficial to the cavitation effect. This provides a theoretical basis for further research on the mechanism of ultrasonic assisted electrochemical polishing of SLM-NiTi alloy, which is of great significance for broadening the processing of additive manufacturing parts with low cost, high efficiency, and consistent quality.

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Effect of crystallographic anisotropy on phase transformation and tribological properties of Ni-rich NiTi shape memory alloy fabricated by LPBF

Cited by 15 publications

References 73 publications

Laser powder bed fusion additive manufacturing of NiTi shape memory alloys: a review

Laser powder bed fusion additive manufacturing of NiTi shape memory alloys: a review

Mechanical Properties of NiTi Based Shape Memory Alloy used in Manufacturing of Mars Rover Wheels: Short Review

Dynamical model and numerical study of cavitation bubble in ultrasonic assisted electrochemical polishing solution of selective laser melting NiTi alloy

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