Laser beam powder bed fusion of nitinol shape memory alloy (SMA)

Obeidi, Muhannad Ahmed; Monu, Medad C.C.; Hughes, Cian; Bourke, Declan; Doğu, Merve Nur; Francis, J. Clifford; Zhang, Mimi; Ahad, Inam Ul; Brabazon, Dermot

doi:10.1016/j.jmrt.2021.07.126

Cited by 58 publications

(17 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, an increase in the hatch distance from 100 to 120 µm leads to an enlargement in the grain size of AM-fabricated NiTi from 190 to 478 nm [145]. On the other hand, Obeidi et al [147] demonstrated that the hatch distance has less influence on the physical properties of LPBFfabricated NiTi compared to the laser power and scanning speed. Figure 4 schematically represents the relationship between the important parameters involved in the LPBF process and the physical properties of AM-fabricated NiTi.…”

Section: Powder-bed Fusion (Pbf) 221 Laser Powder-bed Fusion (Lpbf)mentioning

confidence: 99%

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

Safavi

Bordbar‐Khiabani

Khalil‐Allafi

et al. 2022

JMMP

View full text Add to dashboard Cite

Nickel–titanium (NiTi) is a shape-memory alloy, a type of material whose name is derived from its ability to recover its original shape upon heating to a certain temperature. NiTi falls under the umbrella of metallic materials, offering high superelasticity, acceptable corrosion resistance, a relatively low elastic modulus, and desirable biocompatibility. There are several challenges regarding the processing and machinability of NiTi, originating from its high ductility and reactivity. Additive manufacturing (AM), commonly known as 3D printing, is a promising candidate for solving problems in the fabrication of near-net-shape NiTi biomaterials with controlled porosity. Powder-bed fusion and directed energy deposition are AM approaches employed to produce synthetic NiTi implants. A short summary of the principles and the pros and cons of these approaches is provided. The influence of the operating parameters, which can change the microstructural features, including the porosity content and orientation of the crystals, on the mechanical properties is addressed. Surface-modification techniques are recommended for suppressing the Ni ion leaching from the surface of AM-fabricated NiTi, which is a technical challenge faced by the long-term in vivo application of NiTi.

show abstract

Section: Powder-bed Fusion (Pbf) 221 Laser Powder-bed Fusion (Lpbf)mentioning

confidence: 99%

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

Safavi

Bordbar‐Khiabani

Khalil‐Allafi

et al. 2022

JMMP

View full text Add to dashboard Cite

show abstract

“…This scenario was investigated by Obeidi et al [7] during the melting of 3×3×4 mm nitinol (NiTi) testing cubes. The researcher reported that the melt-pool temperature showed clear direct correlation with the input processing parameters and the resulting input volumetric energy density (VED), see Figure 1 (a)(left).…”

Section: The Effect Of the Input Parameters On The Melt-pool Temperaturementioning

confidence: 99%

Investigating the Melt-Pool Temperature Evolution in Laser-Powder Bed Fusion by Means of Infra-Red Light: A Review

Obeidi

Ahad

Brabazon

2022

KEM

Self Cite

View full text Add to dashboard Cite

Recent decades seen the success of Additive Manufacturing (AM) in many industrial applications including aerospace, biomedical, automotive, and tooling. In the manufacturing of metallic parts, AM technology has the ability to produce parts with complex geometries which are difficult or impossible to produce using the conventional fabrication methods, such as machining and casting. Another benefit of AM is the employment of metal and metal alloys which are difficult to machine. Alloys such as titanium, nickel-titanium, and stainless steel have a wide range of applications particularly in the aerospace and biomedical industry. Selective Laser Melting (SLM), also known as Laser Powder Bed Fusion (L-PBF) is a type of AM technology used for the 3D printing of metal and alloy parts. The major drawback in L-PBF technology is the anisotropic properties of the produced parts. From L-PBF, these anisotropies exist due to instant melting and re-solidification of the metal powder, the ultra-high cooling rates and the variant temperature levels across the build layers and within the single layer itself. This article explores the essential role of the melt-pool temperature and temperature gradients that occur during the L-PBF process and their effects on the additively manufactured part’s properties.

show abstract

“…[2] They demonstrated a reversible actuating component using differences in the transition temperature of SMA and SMP, volume ratio between SMA and SMP, as well as heating and cooling rectangular samples of the NiTi SMA on a 316L substrate through L-PBF under various laser conditions to investigate the optimal density and properties. [19] Furthermore, Mahmoudi et al reported on the printability of the NiTi SMA by using simple brick-shaped samples fabricated through L-PBF under various laser conditions. [20] Although a few papers have reported on the basic properties of NiTi SMAs produced through L-PBF with simple rectangle-like shapes, the fabrication of complex 3D structures of NiTi SMAs with the desired functionalities remains challenging because NiTi-based SMAs have a critical drawback of very high sensitivity to composition change.…”

Section: Introductionmentioning

confidence: 99%

“…fabricated rectangular samples of the NiTi SMA on a 316L substrate through L‐PBF under various laser conditions to investigate the optimal density and properties. [ 19 ] Furthermore, Mahmoudi et al. reported on the printability of the NiTi SMA by using simple brick‐shaped samples fabricated through L‐PBF under various laser conditions.…”

Section: Introductionmentioning

confidence: 99%

3D and 4D Printing of Complex Structures of FeMnSi‐Based Shape Memory Alloy Using Laser Powder Bed Fusion

Kim

Ferretto

Leinenbach

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

Laser beam powder bed fusion of nitinol shape memory alloy (SMA)

Cited by 58 publications

References 40 publications

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

Investigating the Melt-Pool Temperature Evolution in Laser-Powder Bed Fusion by Means of Infra-Red Light: A Review

3D and 4D Printing of Complex Structures of FeMnSi‐Based Shape Memory Alloy Using Laser Powder Bed Fusion

Contact Info

Product

Resources

About