Part I.: Friction stir welding of equiatomic nickel titanium shape memory alloy – microstructure, mechanical and corrosion behavior

West, Parker; Shunmugasamy, Vasanth Chakravarthy; Usman, Chaudhry A.; Караман, И.; Mansoor, Bilal

doi:10.1016/j.jajp.2021.100071

Cited by 6 publications

(3 citation statements)

References 87 publications

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“…Even the variation in residual stress across different zones along with the inclusions of wear particles from the tool were the reasons behind the degradation of corrosion protection performance value. Parker et al [48] also reported that the overall corrosion protection performance of the friction stir welded samples was depreciated in contrast with the parent material.…”

Section: Corrosion Resistance Performance Of Friction Stir Welded Nit...mentioning

confidence: 99%

A Review on Present Status of Friction Stir Welding of Nitinol, a Functionally Advanced, Versatile and Widely Used Shape Memory Alloy

Datta,

Biswas

2023

Shape Memory Alloys - New Advances

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Ni-Ti alloys are extensively utilized in different fields of manufacturing because of their typical pseudoelastic effect and the shape memory properties. Welding of NiTinol is always essential to manufacture diverse geometrical structures with sufficient design flexibility following the application necessities. NiTinol is susceptible to compositional variations and microstructural changes because of the welding process. As a result, the mechanical and microstructural properties along with other functional properties get deteriorated with time. Welding of NiTinol without melting is extremely substantial because of the avoidance of the volatilization of the compositional constituents. Friction stir welding, a solid-state welding method, satisfies all the vital necessities of NiTinol alloy welding. This chapter will describe the friction stir welding of NiTinol in both similar and dissimilar material combinations in detail. The effect of different welding process variables on mechanical and metallurgical properties will be described along with the description of the smart functionality of the welded structures and the corrosion resistance performance.

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Section: Corrosion Resistance Performance Of Friction Stir Welded Nit...mentioning

confidence: 99%

A Review on Present Status of Friction Stir Welding of Nitinol, a Functionally Advanced, Versatile and Widely Used Shape Memory Alloy

Datta,

Biswas

2023

Shape Memory Alloys - New Advances

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“…Table 2 shows the work performed in dissimilar joints during the past few years. FSW can be applied to nickel-titanium shape memory alloys (SMAs) without causing any impact to the transformation temperature [71]. The method of joining steel to aluminum have limitations such as limited weldability, formation of pores, intermetallic oxide inclusions, and hot cracks [72].…”

Section: Microstructurementioning

confidence: 99%

A Review of Optimization and Measurement Techniques of the Friction Stir Welding (FSW) Process

Prabhakar,

Korgal,

Shettigar

et al. 2023

JMMP

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This review reports on the influencing parameters on the joining parts quality of tools and techniques applied for conducting process analysis and optimizing the friction stir welding process (FSW). The important FSW parameters affecting the joint quality are the rotational speed, tilt angle, traverse speed, axial force, and tool profile geometry. Data were collected corresponding to different processing materials and their process outcomes were analyzed using different experimental techniques. The optimization techniques were analyzed, highlighting their potential advantages and limitations. Process measurement techniques enable feedback collection during the process using sensors (force, torque, power, and temperature data) integrated with FSW machines. The use of signal processing coupled with artificial intelligence and machine learning algorithms produced better weld quality was discussed.

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“…[13][14][15][16] Few studies have been done on cryo treatment of NiTi SMA. [17][18][19][20][21][22][23] However, no study has been performed on the corrosion properties and mechanical properties of deep cryo treatment of NiTi. The present work is an attempt to find out the effect of cryo treatment on the hardness and corrosion behavior of NiTi SMA.…”

Section: Introductionmentioning

confidence: 99%

Cryo treatment and corrosion studies of nickel-titanium shape-memory alloy

Vishwanatha

Saxena

Pramanik

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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Nickel (Ni)-titanium (Ti) shape-memory alloy (SMA) is a functional material that has received a higher demand in aerospace industries, biomedical industries, actuator, and sensor industries owing to the property of superelasticity and shape memory effect. In addition, SMAs offer better mechanical and corrosion-resistant properties. In this current work, cryo treatment of NiTi alloy has been carried out to investigate the change in the properties. NiTi SMA prepared by powder metallurgy are cryo treated for 12 hours to 48 hours. Further, a corrosion study has been performed on the cryo-treated NiTi samples with the variation in corrosion time to know the effect on the morphology and the hardness. It is found that cryo-treated NiTi shows higher resistance to corrosion than the non-treated sample. The present work is an attempt to find out the effect of cryo treatment on the hardness and corrosion behavior of NiTi SMA. In the scanning electron microscope (SEM) analysis, it is observed that with the increase in cryo treatment time, NiTi (martensite) phase increases. Similar phases are present in both untreated and cryo-treated NiTi pellets. Out of all cryo-treated NiTi pellets, 24 hours cryo-treated NiTi has a lower percentage of corroded area with an increase in the corrosion exposure time. Corrosion preferentially starts at the pit area and progresses toward the Ti-rich area. The hardness value increased for 48 hours cryo-treated sample when compared with other cryo-treated and untreated NiTi pellets.

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Part I.: Friction stir welding of equiatomic nickel titanium shape memory alloy – microstructure, mechanical and corrosion behavior

Cited by 6 publications

References 87 publications

A Review on Present Status of Friction Stir Welding of Nitinol, a Functionally Advanced, Versatile and Widely Used Shape Memory Alloy

A Review on Present Status of Friction Stir Welding of Nitinol, a Functionally Advanced, Versatile and Widely Used Shape Memory Alloy

A Review of Optimization and Measurement Techniques of the Friction Stir Welding (FSW) Process

Cryo treatment and corrosion studies of nickel-titanium shape-memory alloy

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