Compression fatigue behavior of laser processed porous NiTi alloy

Bernard, Sheldon A.; Balla, Vamsi Krishna; Bose, Susmita; Bandyopadhyay, Amit

doi:10.1016/j.jmbbm.2012.04.010

Cited by 71 publications

(28 citation statements)

References 30 publications

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“…The type of the machines, the laser power, the powder composition as well as the substrate composition are summarized in Table 1. [55,56] -These values were not reported.…”

Section: Additive Manufacturing Techniques To Produce Niti Partsmentioning

confidence: 98%

Fabrication of NiTi through additive manufacturing: A review

Elahinia

Moghaddam

Andani

et al. 2016

Progress in Materials Science

673

228

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Nickel-titanium (NiTi) is an attractive alloy due to its unique functional properties (i.e., shape memory effect and superelasticity behaviors), low stiffness, biocompatibility, damping characteristics, and corrosion behavior. It is however a hard task to fabricate NiTi parts because of the high reactivity and high ductility of the alloy which results in difficulties in the processing and machining. These challenges altogether have limited the starting form of NiTi devices to simple geometries including rod, wire, bar, tube, sheet, and strip. In recent years, additive manufacturing (AM) techniques have been implemented for the direct production of complex NiTi such as latticebased and hollow structures with the potential use in aerospace and medical applications. It worth noting that due to the relatively higher cost, AM is considered a supplement technique for the existing. This paper provides a comprehensive review of the publications related to the AM techniques of NiTi while highlighting current challenges and methods of solving them. To this end, the properties of conventionally fabricated NiTi are compared with those of AM fabricated alloys. The critical steps toward a successful manufacturing such as powder preparation, optimum laser parameters, and fabrication chamber conditions are explained. The microstructural characteristics and structural defects, the influencing factors on the transformation temperatures, and functional properties of NiTi are highlighted to provide and overview of the influencing factors and possible controlling methods. The mechanical properties such as hardness and wear resistance, compressive behaviors, fatigue characteristics, damping and shock absorption properties are also reported. A case study in the form of using AM as a promising technique to fabricate engineered porous NiTi for the purpose of creating a building block for medical applications is introduced. The paper concludes with a section that summarizes the main findings from the literature and outlines the trend for future research in the AM processing of NiTi.

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“…The type of the machines, the laser power, the powder composition as well as the substrate composition are summarized in Table 1. [55,56] -These values were not reported.…”

Section: Additive Manufacturing Techniques To Produce Niti Partsmentioning

confidence: 98%

Fabrication of NiTi through additive manufacturing: A review

Elahinia

Moghaddam

Andani

et al. 2016

Progress in Materials Science

673

228

View full text Add to dashboard Cite

show abstract

“…In terms of fatigue response, superelastic NiTi displays superior fatigue life. 60 Bernard et al 61 demonstrated that LMD-made NiTi alloys (mostly martensitic phase with 80-99% porosity) can sustain 10 6 compression fatigue cycles with a stress up to 1.4× the yield strength for denser parts with closed porosity. 61 , 62 However, for NiTi porous structures, there is not yet much reliable fatigue data in the literature.…”

Section: Mechanical Behavior and Shapememory Response Of Bulk And Pormentioning

confidence: 99%

Laser additive manufacturing of bulk and porous shape-memory NiTi alloys: From processes to potential biomedical applications

et al. 2016

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“…This reduces the problem of stress shielding [17][18][19]. Porous structure favors long-term stability by providing high in-growth of living tissues and firm fixation [20]. In porous metallic implants, pore size and its interconnectivity significantly affect the adhesion and new tissue in-growth [21][22][23][24].…”

Section: Biomedical Applicationsmentioning

confidence: 99%

Applications of Nickel-Titanium Alloy

2015

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1.Nitinol exists in equiatomic phase of nickel-titanium (Ni-Ti). Nitinol has various applications in biomedical, automotive actuators, micro-electromechanical systems (MEMSs) and aero-space industries due to its distinctive properties of pseudo-elasticity, bio-compatibility, corrosion resistance and shape memory effect. This paper presents the applications of nickel-titanium alloy in various field of engineering, medical and other area. The attractive properties of NiTi alloy has also been discussed that makes it most influential material for various applications. ABSTRACT Figure 1: Martensitic transformation and hysteresis (H) upon a change of temperature

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Compression fatigue behavior of laser processed porous NiTi alloy

Cited by 71 publications

References 30 publications

Fabrication of NiTi through additive manufacturing: A review

Fabrication of NiTi through additive manufacturing: A review

Laser additive manufacturing of bulk and porous shape-memory NiTi alloys: From processes to potential biomedical applications

Applications of Nickel-Titanium Alloy

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